Add Yahoo as a preferred source to see more of our stories on Google. Humans have the largest penis-to-body size proportions of most primates. To better understand the psychological influences on ...

This is the long and short of it. A female doctor says most people overestimate the size of the average penis, claiming most men barely measure more than five inches even when they’re rock hard. Dr.

Forbes contributors publish independent expert analyses and insights. GrrlScientist writes about evolution, ecology, behavior and health. “All complicated machines and appliances are very probably the ...

It’s an age-old debate in the gay community: does size matter? Well, according to a new study in the scientific journal The Aging Male, it does. At least, in the eyes of the beholder. The relatively ...

For years we’ve heard the old adage that “size matters.” And according to a new study, it turns out that it really does, but maybe not for the reasons—or to the people—you expected. A new study ...

Keersten Fitzgerald does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations ...