Get it?

Two headhunters run into each other in the jungle. They haven't seen each other for a while and start chatting about what's been going on.

Head Hunter #1: I caught one of the missionaries the other day
Head Hunter #2: Oh yeah?
HH1: Yeah, one of those all covered in brown. I boiled him up, and he tasted AWFUL!
HH2: Boiled him you say? One of those missionaries all covered in brown?
HH1: That was him alright
HH2: Well there's your problem. You don't boil those. Those are friers!