When a guy jizzs' in another mans butt, pulls out and sticks a straw in his rectum and sucks out his cum, and the man farts in his mouth while he is still sucking through the straw. ( It could be male or female )
I.e : Mike is sucking his cum out of Tyler's rectum when Tyler "Pink Mouths" Mike.
the act of stabbing one's balls while ejaculating into a white cloth or napkin. the mixture of blood and semen results in a light pink color, hence the name "pink napkin".
Guy #1: I really want to try out some new masturbation techniques.
Guy #2: Have you tried the pink napkin?
Guy #1: No thanks, I'm planning on having kids someday.