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Index/Topics/PNAS research on penis size effects

PNAS research on penis size effects

Research findings on how penis size affects attractiveness judgments and its relation to evolved mating considerations

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3 results
Jan 13, 2026

Are there psychological factors that make women perceive penis size as important for orgasm?

Research finds measurable psychological associations between women's reports about penis size and their likelihood of vaginal (but not clitoral) orgasm, but the picture is mixed: some studies show pre...

Jan 11, 2026

How do cultural and age differences affect women’s reported preferences for penis size in survey research?

Survey research consistently finds that most women report being satisfied with their partner’s penis size and that age per se shows little systematic change in that satisfaction across adult decades, ...

Jan 8, 2026

How do reports of sexual satisfaction related to penis size differ between casual sexual encounters and long-term partnerships?

Reports about penis size and sexual satisfaction split along context lines: in casual, one-off encounters physical attributes—especially girth—are more often reported as influential, whereas in long-t...

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