I. Conclusion First: External Prolonging Agents Are Not Better the More Numbing They Are

Many customers ask me: "Between the Japanese Marumori Prolonging Liquid Men's Delay Spray, Prolonging Spray, Adult Products, Delay and Erection Aid, Male Health, and those German-made external prolonging agents, which one is stronger?"

There is a common misconception here:

Misconception: The more numbing, the longer it lasts; the larger the dose, the better.

The reality is:

The core mechanism of delay sprays is to "reduce glans sensitivity," but if it's too numbing, pleasure will significantly decrease, even affecting erections and orgasms.

A reasonable extension is usually about 10-30 minutes added to the original time. For most people, going from "a few minutes to over ten or twenty minutes" is enough to improve the experience.

So, when choosing an external prolonging agent, focus on:
1. Ingredients and Gentleness: Is it mainly plant extracts, or does it contain local anesthetic ingredients?
2. Onset Speed: How long before intercourse does it need to be applied?
3. Duration: How long does one application typically last?
4. Numbness and Side Effects: Does it affect pleasure? Is it likely to irritate the skin?
5. Price and Cost-Effectiveness: Is it affordable for long-term use?

This article will focus on comparing three products:

Japanese Marumori Prolonging Liquid

German EROS Prolonging Liquid

German Black Diamond Prolonging Liquid

We will analyze them based on the five dimensions above to help you see who they suit and how to use them more safely.

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II. The Principle of External Prolonging Agents: Essentially "Desensitization," Not "Kidney Tonic"

Let's clarify the mechanism first, otherwise, it's easy to be misled by various "kidney-tonifying and aphrodisiac" marketing copy.

1. External Delay Sprays Mainly Do Two Things

(1) Reduce Local Sensitivity

Most products use plant extracts, alcohol, or trace amounts of local anesthetic ingredients to mildly inhibit nerve excitement on the glans surface.

An ideal state is: the sensation of stimulation is somewhat blunted, but there is still noticeable pleasure and erection response.

(2) Indirectly Prolong the Ejaculation Latency Period

The threshold for nerve excitement is raised, changing from "wanting to ejaculate immediately upon entry" to "needing more time and stronger stimulation to approach climax."

The extension range is generally an increase of about 10-30 minutes from the original baseline, with significant individual variation.

2. Difference Between External and Oral Products

Many people confuse sprays with oral products (like Japanese Tadas, American health supplements, etc.). The core differences are:

External Prolonging Liquid:

- Acts on local skin nerves.
- Generally takes effect within 20-60 minutes and lasts about 40-90 minutes.
- Does not permanently alter your constitution after stopping use; it's more like a "session tool."

Oral Health Supplements or Medications:

- Affect systemic factors like blood flow, hormones, and psychological state.
- Have certain requirements for cardiovascular and liver/kidney health; caution is needed for those with high blood pressure or heart disease.
- Improper adjustment can lead to systemic reactions like headaches, facial flushing, and palpitations.

If you are:

Able to get an erection but ejaculate quickly.

Or occasionally want to "last longer" without taking pills regularly.

Then external prolonging liquid is usually a gentler, lower-barrier starting point.

For a more systematic guide on safe spray usage, you can refer to articles on delay products, such as the Indian God Oil Spray usage guide. The core principles are consistent: use a small amount, apply in advance, pay attention to cleaning, and avoid contact with your partner's oral mucosa.

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III. Horizontal Comparison of Three Prolonging Liquids: Gentleness vs. Onset Speed

For easy reading, here is a point-by-point comparison of three representative external prolonging liquids:

1. Ingredients and Formula Tendency

Japanese Marumori Prolonging Liquid (External Prolonging Liquid)

- Officially positioned as a gentle formula, focusing on delay with "no obvious numbness."
- Common approach: mainly plant extracts with a small amount of alcohol for penetration, reducing sensitivity while trying to preserve tactile sensation.
- Leans more towards a "conservative, safety-first" route.

German Imported EROS Ilus 101

- German-style prolonging liquids generally emphasize "high-purity raw materials + relatively stable ratios."
- Common practice: low concentration local anesthetic + moisturizing base, balancing lubrication and delay.
- Overall "desensitization strength" is slightly higher than the gentle Japanese style.

German Black Diamond Prolonging Liquid

- Brand descriptions often emphasize "strong essence, aphrodisiac, fast-acting," which usually implies higher irritation and desensitization strength.
- Suitable for users with good tolerance for stimulation and more "aggressive" needs.
- First-time users must start with the lowest dose, otherwise, excessive numbness is very likely.

Simple Understanding:

If you want something "gentler," prioritize Japanese Marumori.

If you want something "stable but fast-acting," look at EROS.

If you want something "stronger, to maximize time," Black Diamond is more suitable, but it also requires more careful dosage control.

2. Onset Time and Approximate Duration Range

The following are approximate ranges based on product descriptions and experience with similar formulas (not exact values):

Japanese Marumori Prolonging Liquid

- Recommended to spray about 20-30 minutes before intercourse.
- After full absorption, the effect typically lasts around 40-70 minutes.
- Better suited for planned intimacy (not a "spur-of-the-moment" rhythm).

German EROS 101

- Common descriptions mention onset in about 10-20 minutes.
- Duration is about 50-80 minutes, with significant individual variation.
- For those with uncertain foreplay duration, allowing 20 minutes is safer.

German Black Diamond Prolonging Liquid

- Official marketing often emphasizes "lightning-fast onset," typically achieving noticeable desensitization in 8-15 minutes.
- A relatively higher proportion of users can achieve extensions significantly exceeding 30 minutes, but this is more dependent on dosage and individual constitution.
- Better suited for a "spray first, then gradually get into the mood" approach.

3. Numbness and Side Effect Risks

Japanese Marumori

- Sensation: Most feedback indicates "slight blunting, but not numb"; can still clearly feel friction.
- For Partner: Because it's gentle, after full absorption + proper cleaning, the impact on the partner is relatively small.
- Risk: If applied repeatedly over a large area, local dryness or mild itching may still occur; reduce dosage or stop using and observe.

German EROS

- Sensation: Desensitization is slightly more noticeable than Marumori; may feel "stimulation slows down, but pleasure remains."
- For Partner: Similarly, check absorption before intercourse; rinse off surface residue with water if necessary.
- Risk: People with sensitive skin may experience brief stinging or a warming sensation, usually subsiding within minutes. If discomfort persists, stop use and consult a doctor.

German Black Diamond

- Sensation: At the higher end of the recommended dose, "significant numbness or even difficulty reaching orgasm" may occur.
- For Partner: If not fully absorbed before entry, the partner may also feel numbness or dryness. Especially avoid residue during oral sex.
- Risk: Over-spraying can negatively impact erection hardness and orgasm sensation. Not suitable for those seeking "delicate pleasure."

4. Price and Cost-Effectiveness Range

Prices vary by channel; here are only approximate relative positions:

Japanese Marumori Prolonging Liquid

- Single bottle price is generally in the mid-to-high range.
- Each bottle can support approximately 20-40 complete applications.
- Better for those who value formula gentleness and are willing to pay a bit more for a "comfortable experience."

German EROS 101

- Price is typically mid-range to mid-high.
- German brands have a good reputation for quality control, suitable for users who value "stability + overall experience."

German Black Diamond

- Price is mostly in the mid-range across various channels. When broken down per use, the single-use cost is not high.
- If you can achieve satisfactory delay with a lower dose, the cost-effectiveness is quite prominent.

For a broader comparison, you can also read the External Prolonging Liquid Review to see Marumori and German products within a larger market context.

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IV. Ingredient and Efficacy Breakdown: Gentle Type vs. Strong Type

Many men only care about "how much longer can I last," but from a health perspective, it's more important to understand whether you can handle this level of desensitization.

1. Gentle Type (Japanese Route, Represented by Marumori)

Common Configuration:

- Plant extracts (e.g., Cnidium, Clove, Cinnamon) + small amount of alcohol or penetration enhancer.
- Some also include moisturizing and soothing ingredients to reduce irritation.

Sensation Characteristics:

- Gentler than some "Indian God Oil" types; strong burning sensation is rare.
- At normal dosage, you can still feel excitement and pleasure, just not as "sensitive and quick to ejaculate."

Suitable For:

- First-time users of external delay products who are worried about discomfort.
- Those whose baseline time isn't extremely short, just wanting to improve from "a few minutes" to "over ten or twenty minutes."

2. Strong Type (Some German & "God Oil" Routes)

Common Configuration:

- Low concentration local anesthetics (e.g., Lidocaine, Benzocaine) + alcohol base.
- Higher desensitization strength and faster onset.

Sensation Characteristics:

- Quickly transitions from "heat, sting" to "dull, numb" after spraying.
- Slightly higher dosage can lead to "significantly reduced pleasure or even difficulty ejaculating."

Suitable For:

- Those with obvious moderate-to-severe premature ejaculation, often "finishing very quickly."
- The primary goal is "to increase time," and they can accept some sacrifice of pleasure in the short term.

Practical Advice: If you're unsure about your tolerance, start with a gentle type and a small amount, then gradually adjust the brand or formula strength based on your actual sensation.

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V. Who Are the Three Products Suitable For?

Based on common questions, let's break it down by scenario.

Question 1: I'm just a bit quick, not "finishing in under a minute." Which one should I choose?

Recommended Priority: Japanese Marumori Prolonging Liquid or German EROS.

Reason:

- Gentle or moderate desensitization is enough to go from "3-5 minutes" to "over ten or twenty minutes."
- Less loss of pleasure, better for long-term stable relationships.

Question 2: I have typical premature ejaculation, almost "finishing upon entry," and my erections are a bit unstable?

Priority Plan:

- If you just want to try the external route first, you can try German Black Diamond, starting with a small dose of 1-2 sprays.
- If the erection problem is significant, relying solely on external products may not be enough. Consider lifestyle adjustments, stress reduction, and if necessary, evaluate with a doctor whether oral medication is needed.

Question 3: I'm worried about numbing my partner. Which one is more "partner-friendly"?

First Choice: Japanese Marumori (gentle type).

Regardless of the product:

- Wait long enough for absorption after spraying (usually about 20 minutes).
- If oral sex is planned, it's advisable to rinse off surface residue with water beforehand.
- Avoid getting large amounts of spray on the partner's vaginal or oral mucosa.

Question 4: I'm sensitive to alcohol and fragrances, prone to redness and itching. What should I do?

Advice:

- Do a small patch test for any brand first (e.g., on the inner wrist or base of the penis).
- If there's no significant redness or stinging within 10-20 minutes, try a small amount on the sensitive area.
- If persistent redness, itching, or rash occurs, stop use immediately and consider seeking medical attention.

Question 5: Limited budget, but want to use it stably for a while?

Approach:

- Calculate the "cost per use": look at the number of uses per bottle and the unit price.
- Most people find that after finding the right dose, the actual amount sprayed is less than the instructions suggest, lowering the per-use cost.

If you can get satisfactory results with a lower dose, German Black Diamond and some mid-range German prolonging liquids offer good overall cost-effectiveness. If you prioritize gentleness and comfort, Japanese Marumori, even at a slightly higher unit price, can be seen as paying a bit more for "skin and experience."

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VI. Usage Methods and Precautions: Key Details Affecting Results

Regardless of which product you choose, the usage steps are roughly similar. Getting the details right often yields much better results than spraying haphazardly.

1. Standard Usage Steps

1. Cleanse:
- Wash the glans and coronal sulcus with warm water, then gently pat dry.
- Avoid strong alkaline soaps to prevent worsening dryness or irritation.

2. Shake the Spray (if indicated on the instructions):
- Gently shake a few times to ensure the ingredients are evenly distributed.

3. Apply a Small Amount:
- Start with 1-2 sprays for the first time.
- Focus on the glans and coronal sulcus. A small amount can be applied to the shaft, but avoid soaking a large area.

4. Massage for Absorption:
- Gently spread the spray with your fingertip to ensure even distribution.
- Avoid the urethral opening and glans fissure to prevent stinging.

5. Wait for Absorption:
- Japanese gentle type: Allow 20-30 minutes.
- Most German types: Allow 10-20 minutes.
- If oral sex is planned or you're worried about numbing your partner, you can briefly rinse with water before intercourse.

6. Adjust Dosage Based on Results:
- If the time hardly changes, add +1 spray next time.
- If you have significant difficulty reaching orgasm or pleasure is too low, reduce by 1 spray next time or switch to a gentler brand.

2. Safety Precautions

Do Not Apply Frequently in Succession:

- Applying multiple times in one evening significantly increases the risk of skin irritation and allergies.
- It is generally recommended to use it only once per sexual encounter; do not reapply multiple times in a short period.

Avoid Wounds and Broken Skin:

- If you have balanitis, glans inflammation, or sores, treat the condition first and do not use delay sprays during this time.

Do Not Mix with Other Topical Medications:

- Using it simultaneously with anti-inflammatory creams, hormonal creams, etc., makes absorption unpredictable and increases the risk of adverse reactions.

Not for Minors:

- Sexual function issues in adolescents are often due to psychological stress or lack of knowledge; such products should not be used to mask the problem.

Communicate with Your Partner:

- Briefly talk to your partner before use: "I'm thinking of trying an external delay spray; it might have a slight smell or cooling sensation."
- If your partner feels dryness or numbness, adjust the dosage or stop using it promptly.

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VII. Quick Answers to Common Questions (Concise Q&A on Prolonging)

1. Will external prolonging liquids make me dependent?

Most external delay sprays are not addictive, and stopping them won't worsen your physiological function. However, if you rely solely on the spray without addressing anxiety, communication issues with your partner, or lifestyle habits, a psychological "inability to let go" is common. Advice:

Treat the external product as a "training aid."

Simultaneously engage in moderate exercise, stress reduction, and communication, gradually reducing usage frequency from "every time" to "occasionally."

2. Can I use them together with oral products?

In principle, external + oral can have a combined effect, but the risks also increase:

Oral products affect the cardiovascular system and central nervous system.

External products prolong time, leading to greater overall physical exertion.

People with cardiovascular issues or high blood pressure should be especially cautious.

If you plan to try this combination, you must:

First, get a medical evaluation to confirm your physical condition.

Start with low doses of both, avoiding "strong pill + strong spray" simultaneously.

3. Why do I have difficulty getting an erection after using an external spray?

Three common reasons:
1. Sprayed too much, causing excessive local numbness, lack of pleasure, and reduced motivation for an erection.
2. Excessive worry about "being found out," etc., where psychological burden outweighs the physiological change.
3. Underlying erectile dysfunction that is amplified by the spray.

How to deal with it:

Next time, significantly reduce the dosage or switch to a gentler brand (like Japanese Marumori).

Observe your erection quality when not using the spray at all. If it's still poor, seek medical evaluation promptly.

4. What if my partner accidentally feels numb?

If it's mild, transient numbness, it usually resolves on its own within a few minutes to over ten minutes:

Stop sexual activity immediately and rinse the vulva or mouth with water.

Observe for persistent irritation, redness, swelling, or burning pain. If present, seek medical attention.

Future adjustments: Extend the waiting time after the man sprays, and rinse off residue before entry.

5. Do I need to wash it off every time after use?

It's not mandatory to wash immediately, but for hygiene and partner comfort:

If there's no oral sex planned and your partner has no discomfort, you can wash together afterwards.

If oral sex is planned or you're worried about your partner's skin sensitivity, it's advisable to briefly rinse the surface with warm water before entry. This preserves the absorbed effect while reducing cross-irritation.

6. Can I use it every day? How many times a week is appropriate?

As long as there is no significant irritation or allergy, there is no strict "daily ban" from the instructions. However, from a health and relationship perspective, it's better to:

Limit use to 2-3 times per week.

Spend the rest of the time on non-penetrative intimacy, communication, and exercise training, so the sexual experience doesn't become overly dependent on the spray.

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VIII. How to Choose for Different People: Practical Scenarios

1. Mildly Short Duration, Seeking Natural Sensation

Recommended Priority: Japanese Marumori Prolonging Liquid.

Alternative: German EROS (starting with a low dose).

Reason:

- The experience feels more "natural but less sensitive."
- Less impact on the partner, better for long-term stable relationships.

2. Obvious Moderate Premature Ejaculation, Wanting to "Increase Time First"

Recommended Priority: German Black Diamond Prolonging Liquid or another similarly strong product.

Combination: If necessary, evaluate with a doctor whether oral medication is needed.

Usage Strategy:

- Start with 1-2 sprays, gradually adjust to a dose where you can "control climax but still feel pleasure."
- Strictly adhere to the principle of using it only once per night to avoid excessive numbness.

3. Very Sensitive to Ingredients and Irritation, Skin Prone to Discomfort

Recommended Approach:

- Start with a patch test using a gentle Japanese formula (like Marumori).
- Minimize products with high alcohol or fragrance content.
- If discomfort persists, consider switching to non-pharmacological interventions (e.g., behavioral therapy, stress reduction).

4. Limited Budget, But Wants a Fixed Go-To Product

If you get good results with a low dose:

- Mid-priced products like German Black Diamond have a lower cost per use.

If you prioritize skin and partner comfort:

- Gentle products like Japanese Marumori, though slightly higher in unit price, are often a better investment in "experience cost" for long-term relationships.

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IX. Final Advice: Endurance Doesn't Just Rely on Sprays

Whether you choose Japanese Marumori, German EROS, or Black Diamond, view the external prolonging liquid as:

An auxiliary tool to help you "break the vicious cycle," not the only solution.

True, long-term stable endurance depends more on:

Sleep, exercise, and diet, keeping your body in a less fatigued state.

Reducing excessive focus on "performance" and communicating genuine feelings with your partner.

Moderately training to control rhythm and breathing, rather than just chasing a number on the clock.

Sprays can help you break free from the frustration of "finishing too quickly every time," giving you some time and confidence to try healthier, long-term adjustment paths.

If, after using sufficiently gentle products and standard methods, you still frequently "finish within a minute" or have difficulty with erections, it is recommended not to blindly switch brands. Seek help from a professional doctor promptly for a more efficient and safer solution.