A new study has found that people make assumptions about personality traits based on penis size, girth, and pubic hair. Researchers Thomas R. Brooks and Stephen Reysen surveyed 106 college students, mostly female, who viewed 24 images of penises varying in these attributes.
Participants rated each image on perceived sexual activity, number of partners, and personality traits. Results showed that men with wider penises were seen as more sexually active and skilled, while longer penises were associated with higher attractiveness and extraversion. Narrow penises were linked to neuroticism.
Pubic hair also played a role: fully shaved or untrimmed pubic hair received negative judgments, with a preference for moderate grooming. Long pubic hair was perceived as a sign of introversion and lower openness to experience, while manscaping was linked to attractiveness and sexual prowess.
Brooks noted the research stemmed from conversations about online dating and explicit media. He emphasised that sharing such images leads to assumptions about personality and behaviour, beyond just size preferences.
