“The mating rites of mantises are well known: a chemical produced in the head of the male insect says, in effect, “no, don’t go near her, you fool, she’ll eat you alive.” At the same time a chemical in his abdomen says “yes, by all means, now and forever yes.” While the male is making up what passes for his mind, the female tips the balance in her favor by eating his head. He mounts her.”