"Death Grip Syndrome": Masturbation Habits, Delayed Ejaculation, and How to Retrain

"Death grip" is an internet nickname, not a medical diagnosis. It describes a situation many men recognize: they can climax easily on their own, but find it difficult or impossible with a partner. Doctors call the broader problem delayed ejaculation, and sex therapists have long noticed that a man's masturbation style is often part of the story. This guide explains what the research says, what Japanese urologists have learned about habits like "floor masturbation," and how a gradual retraining approach works.

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What delayed ejaculation is, and how "idiosyncratic masturbation" relates to it
The specific habits Japanese urologists see most often, including floor masturbation
A step-by-step retraining approach, and what results to realistically expect
When to see a urologist or sex therapist, especially if you are trying to conceive

What doctors mean by delayed ejaculation

The UK's National Health Service (NHS) describes delayed ejaculation as either a significant delay before ejaculating, or being unable to ejaculate at all even though a man wants to and his erection is normal. It suggests you may have delayed ejaculation if you are unable to ejaculate more than half the times you have sex (NHS, Ejaculation problems).

A review in the World Journal of Men's Health calls delayed ejaculation "poorly defined and uncommon," notes that it can frustrate couples trying to conceive, and stresses that its causes are multifactorial, involving both physical and psychological factors (Abdel-Hamid & Ali, 2018). In other words, masturbation habits are one important piece, not the only one.

In Japan, the specific pattern of being able to ejaculate during masturbation but not inside a partner during intercourse is often discussed as "intravaginal ejaculatory dysfunction." According to a men's health clinic run by urologist Yoshitomo Kobori in Tokyo, a Japanese Ministry of Health, Labour and Welfare survey found it accounts for more than 7% of cases of male infertility (Private Care Clinic Tokyo).

Where "death grip" fits: idiosyncratic masturbation

American sex therapist Michael Perelman, who developed the Sexual Tipping Point model for treating delayed ejaculation, wrote that "many men with DE engage in an idiosyncratic masturbatory style, defined as a masturbation technique not easily duplicated by the partner's hand, mouth, or vagina" (Perelman, 2016).

Perelman describes delayed ejaculation as made worse by insufficient stimulation, an inadequate combination of what he calls "friction and fantasy." If years of solo practice have trained your body to respond to very specific pressure, speed, or position, partnered sex may simply not deliver enough of the stimulation your body has learned to expect. Anxious thoughts during sex can make things harder still.

That is the core idea behind the "death grip" label. It is not that masturbation is harmful. It is that a narrow, intense routine can become the only route to climax.

The habits Japanese urologists see most often

Japanese urologists have described several specific patterns. Dr. Kobori's clinic says that more than half of cases of intravaginal ejaculatory dysfunction stem from inappropriate masturbation habits that began in adolescence, and lists these common types (Private Care Clinic Tokyo):

Habit	What it involves	Why it can cause trouble
Floor masturbation ("yuka-ona")	Pressing against a floor, bed, or pillow without using the hands	Pressure and position are very different from partnered sex
Strong grip	Gripping very hard or moving very fast	Stimulation is usually much stronger than during intercourse
Over-the-foreskin only	Stimulating only through the foreskin, without exposing the glans	The body gets used to one specific sensation
Leg-straight position ("ashi-pin")	Only able to climax lying down with legs stretched and tensed	That posture is hard to reproduce with a partner

The same clinic notes other contributing factors too: relationship issues, fear of conception, a strict upbringing that taught sex was bad, or only being able to climax while watching adult videos.

How common are these habits? Data from Japanese manufacturer TENGA Healthcare gives some sense of scale, though it should be read as company-commissioned research rather than peer-reviewed data. In a 2017 announcement, the company estimated about 2.7 million men in Japan may have intravaginal ejaculatory dysfunction and attributed 70.9% of cases to inappropriate masturbation (TENGA Healthcare, 2017). In its 2026 report on an online survey conducted in 2024, the company said 63.8% of surveyed men masturbated with a "strong grip," and that many of them rated their own technique as appropriate (TENGA Healthcare, 2026).

Evidence for retraining: what one Japanese study found

Dr. Kobori and colleagues published a small clinical report in the Japanese Journal of Urology. Between January 2010 and March 2011, 16 men with intravaginal ejaculatory dysfunction went through "ejaculation rehabilitation" using a masturbation aid (a TENGA product) to correct their technique (Kobori et al., 2012):

12 of the 16 men (75%) became able to ejaculate using the aid.
5 of the 16 men (31%) went on to ejaculate during intercourse with their partner.

These results are encouraging but limited. The study was small, had no comparison group, and most men had not reached the main goal by the end of the report. It is best seen as early evidence that changing technique can help some men, not a guarantee.

TENGA Healthcare later released the Men's Training Cup, a set of five cups with different firmness levels, from hard to soft, designed to be used in sequence so stimulation becomes gradually gentler (TENGA Healthcare, 2017). The idea mirrors the retraining principle below. A product like this is optional; the same principle can be applied with your hand and lubricant.

Each circle is one man (16 in total, January 2010 to March 2011). Source: Kobori et al. (2012).

A step-by-step retraining approach

Perelman notes that "discontinuing, reducing or altering masturbation is often required," and that men who continue to masturbate should "alter style ('switch hands')" and approximate the stimulation they are likely to experience with a partner (Perelman, 2016). Building on that, a gradual plan usually looks like this:

Take a short break or reduce frequency. In Perelman's approach, a pause or reduction is often part of treatment. If a full break feels impossible, he notes it can be negotiated, and cutting back while changing style is still a step forward.
Change position first. If you use floor or pillow pressure, switch to lying on your back or sitting and using your hands. Keep your legs relaxed and knees slightly bent instead of straight and tense.
Use plenty of lubricant and loosen your grip one step. Aim for "a little gentler than usual," not a dramatic change. It is fine if you do not finish on a given day.
Slow down and vary the rhythm. Mix slower strokes into your routine rather than relying on one fast pattern.
Switch hands. Using your non-dominant hand breaks the automatic pattern, as Perelman suggests.
Bring attention to sensation. Notice touch and breathing rather than relying only on intense visual input. If you usually need videos, try some sessions without them.
Progress gradually. Move from firmer to gentler stimulation over weeks. Track small wins, such as getting close with less pressure.

Expect this to take weeks to months. Habits built over years rarely change overnight. Progress usually looks like needing a little less pressure each week rather than sudden success.

Cheese Chikuwa-chan stands in for the penis. Steps follow Perelman's (2016) approach as summarized in the article. Stop anything that causes pain or skin damage.

Bringing it into partnered sex

Retraining is only half the picture. Perelman's model emphasizes enhancing "immersion in excitation" during partnered sex, including allowing yourself to use fantasy, and reducing anxious, inhibiting thoughts (Perelman, 2016). Practical steps include:

Talking openly with your partner about what is going on, without blame on either side
Taking pressure off the goal of finishing, so anxiety does not build
Letting your partner know what kinds of touch work for you

The NHS also notes that sex therapy can help by combining talking therapy with structured changes to your sex life, and that involving your partner is usually recommended (NHS, Ejaculation problems).

Other causes to rule out

Do not assume masturbation habits are the only explanation. The NHS lists several physical causes of delayed ejaculation, including diabetes, spinal cord injury, multiple sclerosis, bladder or prostate surgery, and increasing age. Many medicines can also cause it, including antidepressants (particularly SSRIs), some blood pressure medicines such as beta-blockers, and antipsychotics. Alcohol and recreational drugs can contribute as well (NHS, Ejaculation problems).

If the problem started suddenly after years without difficulty, or around the time you began a new medication, that is a strong reason to talk to a doctor. Do not stop a prescribed medicine on your own; ask the prescriber about alternatives.

This article is educational and is not a substitute for medical care. See a urologist (ideally one who focuses on men's sexual health or male infertility) if you cannot ejaculate with a partner for an extended period, if you are trying to conceive, if the problem started suddenly, or if you take medicines that may affect ejaculation. A certified sex therapist can help with the psychological and relationship side. Stop any technique that causes pain, bleeding, or skin damage.

The bottom line

"Death grip syndrome" is a casual name for something real: a masturbation style so specific or intense that partnered sex cannot match it. Clinicians in the US and Japan have described the same pattern, and small studies suggest that gradually changing technique can help some men. Change is slow, other causes should be ruled out, and help from a urologist or sex therapist is appropriate, especially if you are planning a pregnancy.

Last reviewed: October 1, 2026