When you reverse the hand when masturbating.
When I masturbate I like to turn my hand around and have a back handed scuttle wank.
The valley between the butt cheeks that leads to the source of the stink hole that often becomes sweaty and stinky. Ie.. the butt crack
On a hot day I find I get a very sweaty stink valley.
That guy is a real filth monger, he was saying all sort of filthy things
The hole in which the human body produces the bum sausage.
I just went to the toilet and made some massive bum sausages fresh from the sausage factory
To masturbate whilst thinking of an individual that is under the age of consent.
Last night I masterbated whilst thinking about my neighbours daughter ie.. had a nonsturbate
A crevice on the human body that gets hot and sweaty. Ie.. cleavage or butt crack
She has massive titties. I bet they create a massive sweaty crevice.