To be fucked in the ass by a large white, hairy man.
Ever have your ass licked by a fat man in a trench coat, no but I got manwitched at a rave the other night!
Wanking while sticking a couple of fingers up your own arse. Sort of like a manual simulation of taking the central role in a no-handed conga, or being the meat in a man sandwich.
Euggh what's that under your fingernails? Oh sorry I got carried away and had a ball pot wank last night.