Advice to expectant mothers: you must remember that when you are pregnant, you are eating for two. But you must remember that the other one of you is about the size of a golf ball, so let's not go overboard with it. I mean, a lot of pregnant women eat as though the other person they're eating for is Orson Welles.
All of the things that the bible warns you of being: jealous, covetous, murderous, selfish, etc. , that's kind of how humans are.