Cock-Stuffing
Apparently somewhat on the fringe in gay circles, but involves using thin, cylindrical items (thermometers, wire, rubber worms, etc.), and inserting them into the dick hole. Over many months, continue to gradually ream out the hole-at-the-head with larger items, thus ultimately allowing your "buddy" to obtain the goal of fucking your urethra. Wow!

Cold Lunch
The act of vomiting directly onto some chick's head while she's performing fellatio.