And excerpt from this thought provoking article on us as social beings from the New Yorker.
“Erica was impressed by him: women everywhere tend to prefer men who have symmetrical features and are slightly older, taller, and stronger than they are. But she was more guarded and slower to trust than Harold was. That’s in part because, while Pleistocene men could pick their mates on the basis of fertility cues discernible at a glance, Pleistocene women faced a more vexing problem. Human babies require years to become self-sufficient, and a single woman in that environment could not gather enough calories to provide for a family. She was compelled to choose a man not only for insemination but for continued support. That’s why men leap into bed more quickly than women. Various research teams have conducted a simple study. They hire a woman to go up to college men and ask them to sleep with her. More than half the men say yes. Then they have a man approach college women with the same offer. Virtually zero per cent say yes.”