The act of a man and woman having sex after a different man has already ejaculated in said woman and man #2's penis is covered in the ejaculate of man #1 upon pulling out.
"I hooked up with Billy in the closet during the party only to bump into Steve right after. He had no idea so when we hooked up I totally gave him a Mayonnaise Popsicle."
Digging your elbow into someone's butt while massaging them.
"Yo, that masseuse totally gave me a mayonnaise popsicle earlier!"
"Bro, that's CRAZY."