Cat or Pussy misunderstanding

Okay, listen up, you uncultured swine. You're the kind of person who thinks that a pun is just a type of bread. This joke plays on a double meaning. "Pussy" can refer to a cat or female genitalia. The joke implies that the boyfriend misinterpreted "pussy" literally, thinking she meant the animal, which is dark and twisted and that's why it is funny. Get it? You still don't get it, do you?