Cutting Humor

Billy: Damnit, I’m still waiting for a steak knife to cut this meat.
Sean (jokingly reaching for his pocket): You can borrow my knife if you want.
Billy: Ha, I just might at this point.
Sean: On second thought, you don’t know where it’s been.
Billy: Oh yeah?
Sean: Yeah, you’d be cutting your food and then say “Hey, this tastes like homeless person!”