What matters most to girls?

Sonar Pro

Vote: Penis width

Scientific studies consistently indicate that **penis width (girth)** is more important to women than length or curvature. Multiple sources, including Prause's 3D model study with 75 women, show women prefer girth for physiological reasons—vaginas have mechanoreceptors that detect stretching from girth better than length[1][3]. A 2001 survey found 45/50 women rated width over length for satisfaction[3]. Preferences average ~4.8-5 inches girth vs. 6.3 inches length for long-term partners[1][3][4]. Length ranks low: Zurich survey placed it third-least important after overall appearance and pubic hair[2]. No source mentions penile curvature as a factor; it's absent from preferences[1][2][3][4]. Girth predicts preference better than length[1]. **B is the clear winner** among options—curvature irrelevant, length secondary, girth primary for pleasure.

GPT-5.4

Vote: Penis width

B is the strongest choice because, in general discussions of sexual comfort and sensation, width is more often associated with perceived fullness than extra length. Length beyond a certain point does not usually add much and can even reduce comfort. Curvature is highly variable and mostly preference-dependent rather than broadly important. The question is also overly generalized: different girls care about different things, and many prioritize emotional connection, communication, hygiene, and sexual skill over anatomy. But if forced to choose among these three, width is the most defensible answer.

Grok 4.1 Fast

Vote: Penis width

Scientific studies, such as those published in journals like BMC Women's Health and surveys by researchers like Dr. Nicole Prause, consistently show that women prioritize penis girth (width) over length for sexual satisfaction. Girth provides greater stimulation to vaginal walls and clitoris due to fuller friction and pressure. Length beyond 5-6 inches offers diminishing returns, as the average vagina depth is about 4 inches aroused, making excess length uncomfortable or ineffective. Width, however, directly correlates with feelings of fullness and orgasm intensity. Penile curvature (C) is rarely cited as a top preference and can even be a concern if extreme (e.g., Peyronie's disease). Length (A) is a common male insecurity but ranks lower in female preferences per data from thousands of respondents.

Gemini 3.1 Pro

Vote: Penis width

Scientific studies and surveys on female sexual satisfaction consistently indicate that girth (width) is generally considered more important than length. This preference is strongly supported by anatomical facts. The highest concentration of sensitive nerve endings in the vagina is located in the outer third, near the entrance. A wider penis provides more friction and stretch to these tissues, more effectively stimulating the surrounding clitoral network. While individual preferences will always vary, physiological mechanics and broad consensus in sexological research point to width being the most impactful factor among the given choices for physical stimulation.

Kimi K2.5

Vote: Penis width

Sexual health research consistently indicates that penile width (girth) tends to be more significant for physical satisfaction than length alone. The vagina's nerve endings are concentrated in the outer third, and greater width provides more pressure against the vaginal walls and clitoral stimulation during intercourse. While individual preferences vary widely, studies suggest that excessive length can cause cervical discomfort whereas adequate width contributes to sensations of fullness without the same risk of pain. Curvature can be beneficial for specific stimulation but is generally considered less universally important than girth. It is crucial to note that communication, emotional connection, and technique typically outweigh any specific anatomical measurement in overall sexual satisfaction.

Claude Opus 4.6

Vote: Penis width

Among the three options provided, research in sexual health and psychology suggests that width (girth) tends to be rated as more important than length or curvature by women when asked about physical sensation during intercourse. Studies published in journals like PLOS ONE and the Journal of Sexual Medicine have found that women who express a preference tend to prioritize girth over length, as greater circumference is associated with more stimulation of nerve endings at the vaginal entrance. Length beyond a certain point can actually be uncomfortable or painful for many women, as it may contact the cervix. Curvature, while it can play a role in stimulating certain areas, is generally a less commonly cited factor in surveys of women's preferences. Of course, it's worth noting that most research also shows that non-physical factors (emotional connection, communication, overall technique) matter far more than any anatomical measurement, but given only these three choices, width is the best-supported answer.

Final Summary

The AI Roundtable reached an immediate and clinical consensus, with all six models identifying width as the primary anatomical factor for physical satisfaction. Led by data-heavy contributions from Sonar Pro and Grok 4.1 Fast, the group noted that while length is a common preoccupation, the physiological structure of the vaginal canal makes girth more impactful for sensation.

All 6 models agreed on "Penis width" after discussion

Strongest Arguments

• Penis width: Scientific research, including studies using 3D-printed models, consistently demonstrates that width provides more effective stimulation of the mechanoreceptors located in the outer third of the vagina, whereas excessive length is often associated with cervical discomfort.