There is a popular opinion that it's usually inexperienced women express a big interest for huge sizes from 7.5 to 9 bone pressed length.

But as it's widely known experienced women, once they try it, change their preferences to somewhat less extreme, but still bigger than average. Because psychological effect from visual dopamine, domination and status of extremely big penis almost never beats regular discomfort and pain during sex.

Here are 6 reasons why according to studies most preffered size is 6.3" for long term relationship (but it's still arguable could it be count as bone pressed or non bone pressed or right in between). We are going to discuss only length here even though that girth is really important too.

1. Lack of Pubic-to-Clitoral Contact (Loss of Coital Alignment)

• Biomechanics: With moderately big penis (15–18 cm / 6–7 inches), a man inserts his penis to the base. His pubic bone presses firmly against the woman's pubic area. Every thrust automatically massages the clitoris (Coital Alignment Technique — CAT).
• The 7+" (18+ cm) Problem: The man is forced to leave 2–5 cm (1–2 inches) of length outside to avoid injuring the cervix. This leaves an empty space between the man's pelvis and the woman's clitoris. The clitoris receives no friction from body contact, depriving the woman of the most reliable way to achieve an orgasm during intercourse.

2. Lack of Scrotal Stimulation in Rear-Entry Positions

• Biomechanics: In the hands-and-knees position (doggy style) during full penetration, the man's scrotum slaps against the woman's perineum and clitoral area with each forward movement, providing pleasant vibrational stimulation.
• The 18+ cm Problem: Because deep bottoming-out is impossible, the man's scrotum hangs in the air and never touches the woman's body. This anatomical bonus is completely lost.

3. Lack of Hip-to-Hip Impact (Distanced Sex)

• Biomechanics: In missionary or cowgirl positions, deep thrusts end with tight hip-to-hip contact. The female pubic and inguinal areas are packed with nerve endings. These rhythmic body-on-body impacts create a sense of total intimacy and increase pelvic blood flow.
• The 18+ cm Problem: Sex becomes purely "piston-like" and distanced. Due to the several-centimeter air gap, the hips never collide. The woman feels the internal movement but is deprived of external warmth and friction, making the sex feel mechanical. Female hips and glutes have a lot of nerve endings which are activated during mating thus affecting the pleasure

4. Blocked Weight and Control in the Cowgirl Position

• Biomechanics: The most orgasmic way for a woman on top is to drop her full weight onto the man's pubic bone and move horizontally (front-to-back), using the penis as an axis rather than a piston.
• The 18+ cm Problem: The woman cannot surrender her weight to gravity because the excess length blocks her. She is forced to keep her thigh and glute muscles constantly flexed (in a semi-squat), acting as a human "depth limiter." Front-to-back movements become impossible because the elevated penis begins to bend at an awkward angle, putting painful pressure on the vaginal walls. There is also a subconscious fear of slipping and suffering a severe internal tear.

5. Inability to Have Rough, Impulsive, and Spontaneous Sex

This point destroys the psychological foundation of female pleasure, which relies on the ability to "turn off the brain" and surrender to primal instincts.

• Loss of Mental Control and Protective Reflexes. For a woman to climax, her somatosensory cortex must be relaxed. With an 18+ cm size, the man must hyper-focus and control every millimeter of movement to avoid hitting the cervix. If he gives in to impulse for even a second, the sex ends in sharp pain. The woman subconsciously anticipates this pain; her body remains tense, and protective reflexes completely block mental relaxation.
• Total Ban on "Rough Sex" and High Speed. A huge portion of female fantasies involves hard thrusting and a fast tempo. With an 18+ cm length, high speed is technically impossible. At high velocity, a man physically cannot calculate a micro-stop before the vaginal dead-end. Fast sex turns into an internal beating, causing a dull, nauseating ache in the lower abdomen.
• The Collapse of Spontaneity ("Checklist Sex"). Quick, spontaneous sex in the kitchen, shower, or car is out of the question. A large size requires a strict ritual: at least 20 minutes of foreplay (so the uterus can tent and lift higher into the pelvis), gallons of artificial lube (due to the massive friction surface area), and a strict selection of safe angles. Without this, sex equals injury, which completely kills the magic of sudden, primal desire.

6. Proximal Girth-Length Paradox (Girth Gradient Mismatch)

• Biomechanics: For female vaginal orgasm, girth is more important than length because the highest concentration of nerve endings (the orgasmic cuff) is located at the vaginal entrance (first 3–4 cm). With a tapered/cone-shaped penis (thicker at the base), an average size perfectly stretches this zone at full insertion.
• The 18+ cm Problem: The most valuable and thickest part of the penis (the root) physically cannot enter the vagina to stimulate the entrance zone. Any attempt to push deeper to utilize this girth is strictly blocked by the cervical barrier. As a result, only the thinner mid-shaft moves inside, while the highly masculine proximal girth remains outside, functionally useless. Consequently, excessive length can literally "nullify" another crucial advantage — a solid, desirable girth at the base.

As it's well known about 7% of women ended their relationship explicitly because of the partner's size is too big. If that would imply only for length, that would mean that there are even some women who find bigger than just 16.5 cm (6.5") bone pressed length - painful for regular sex. Which is consistent with Prause et al 2015; Mautz et al. (2013), Costa et al. (2012), Dixson et al. (2010), Lever et al. (2006), Johnston et al. 2014 and informal female preferred dildo size studies.

So here are 6 reasons why being bigger than 7" bpel is a misleading dream. I know, many of us, porn-poisoned, insecure and modest men wouldn't be convinced.

Also all this implies for generalised 100% of women. If we would consider only the biggest 25% of female preferences, the exact most preferred size would be 7.1" × 5.4", not 6.3"x4.8".

What are your thoughts? Are you convinced or in denial? Make a comment!