Women most often ranked male bodies more attractive when they exhibited a higher shoulder-to-hip ratio (i.e. a V-shape) and a ...

The real revelation, however, came from the men. Men considered a larger penis as an indicator of a rival with both greater ...

A new study suggests humans belong in an elite “league of monogamy,” ranking closer to beavers and meerkats than to chimpanzees. By comparing full and half siblings across species and human cultures, ...

Sexual frequency is an unspoken contract in monogamy. When desire shifts, pain grows—until couples replace silent assumptions ...