A policeman walkig his beat comes across two men on the pavement - one lying face down with hi trousers around his ankles the other with his finger up his companion's arse
"What do ui think you're doing?", asks the Bobby
"My mate's had too much to drink and I'm trying to make him sick", came the reply
"You'll never make him sick by putting your finger up his arse" says the Booby
"I will when I put it in his mouth", came the reply

Similar situation - same Bobby
Same two men on the pavement, one flat on his back with his flies open, the other sucking and blowing his mates's penis
In reply to the Booby's question, the man says, "I'm giving him the kiss of life"
""You do that mouth-to-mouth" says the Bobby
"Have you smelt his breath?"
im Carroll