Why won’t he commit? Why does she inexhaustibly want to talk about the relationship? Why can’t he end our first conversation before he’s attempting to maneuver me into the sack? Why do I have to do so much talking to maneuver her into the sack? Evolutionary biologists can tell you precisely why. It all comes straight down to the sperm and the egg. Let’s take a even nearer glimpse at these two troublemakers. Just about every man produces one-hundred- to three-hundred-milli...