Highlights from the study "Women who prefer longer penises are more likely to have vaginal orgasms" ('Duh!') from the National Library of Medicine:
Aims: To test the hypothesis that vaginal orgasm frequency is associated with women's reporting that a longer than average penis is more likely to provoke their PVI orgasm.
Method: Three hundred twenty-three women reported in an online survey their past month frequency of various sexual behaviors (including PVI, vaginal orgasm, and clitoral orgasm), the effects of a longer than average penis on likelihood of orgasm from PVI, and the importance they attributed to PVI and to noncoital sex.
Results: Likelihood of orgasm with a longer penis was related to greater vaginal orgasm frequency but unrelated to frequencies of other sexual behaviors, including clitoral orgasm. In binary logistic regression, likelihood of orgasm with a longer penis was related to greater importance attributed to PVI and lesser importance attributed to noncoital sex.
Self-reported studies should never be trusted beyond mere curiosity...
Depends. Kinsey came a cropper when he had men measure their penises and mail the results back in on postcards. For some reason the professor of entomology
(study of insects) and zoology
(study of zoos) did not anticipate his young respondents would exaggerate their endowment. He'd never encountered.a dishonest ladybug or earwig. However, Masters and Johnson, who carefully measured every body part that could conceivably be measured, and attached electrodes and other monitoring devices to their study participants during sex, came to similar findings.*
As the possessor of a self-reported small penis, I can personally attest to the findings. I find that longer penises can better stimulate the deeper regions of the vagina that I and my small cohorts are unable to reach. We favor clitoral stimulation and cunnilingus
("eating pussy") to bring a woman to orgasm.
* During their investigation and diligent measuring, M & J came upon the finding that black men on average were slightly larger than white men; they were also prone to having surprisingly more extremely large members
(scientifically described as"whoppers", and more commonly as BBCs ["big black cocks"]. However, they suppressed this result for over twenty years, and long after their marriage, due to fears of the controversy this undoubtedly would incur.These findings have subsequently been routinely dismissed around here by those who invariably claim the need for more study on the matter; nothing beats a good opinion! For study creators, it's very good indeed for business; the government always seems eager to fund arcane studies of some sort. I hesitate to say useless, as scientific studies are highly prized here by those who delight in their dismissal.