https://www.vice.com/en_us/article/n7zen8/what-does-your-dick-pic-say-about-you

Swiping through piles of matches on a dating app requires making snap judgements about people based on their faces. Does this person seem nice? Conscientious? Neurotic? Psychology professors recently asked people to consider another question: What if we were asked to make snap judgments about a person instead by looking at their dick pics?

Researchers at Thomas Brooks at New Mexico Highlands University and Stephen Reysen at Texas A&M University studied what people’s perceptions of others might be, based solely on pictures of their penises. Their study was published this month in the journal Sexuality & Culture.