Because men, compared to male chimps, have such relatively small testicles (large testicles indicate a species where many males mate, one after the other, with the same female), we might guess that promiscuous societies were uncommon in the immediate human… — Carl Sagan Copy Share Image
“In many species, males pay for sex. For example, among black ticked hanging flies, an amorous male will present a female with a nice, juicy insect and then copulate with her while she distractedly enjoys her meal. If the female… — Steve Stewart-Williams Copy Share Image
