Two firefighters are butt fucking in a smoke filled room.
The chief walks in and yells, “What the fuck is going on in here?”
The one firefighter says, “He was suffering from smoke inhalation. “
So the fire chief asks, “Why didn’t you try mouth to mouth?”
The firefighter says, “How the hell do you think this got started!”
This joke is included in the Black Book of Jokes. You can order it from here.