Selfish

Being selfish was the worst obscenity imaginable. When Willie was asked by Keiko what had happened to Fritz, he hesitated and had to look down before telling her he had been "kinda on the selfish side". By contrast, the word "fuck" wasn't a bad word at all so Willie had no trouble asking Keiko to come over to his place "to fuck" while "their critters ran around in the back yard".