Not to step on namgrunt's toes, but here's one for ya' ..

A very modest, straight-laced, church going couple is making love ..

Wife: "Talk dirty to me"
A very surprised husband: "Really, like what?"
Wife: "You know, dirty things."
Husband: "I'm not sure I'm following you, what do you want me to say?"
Wife: "Just tell me things that are dirty."
Husband: "Well, OK .. the kitchen, the bathroom.....
Rofl