When a guy takes his dick and sticks it into jar or peanut butter puts the peanut butter back into the cupboard. Then sticks his dick in the girls pooper. Then the girl licks off everything!
"hey baby want to do the peanut butter cup tonight"
"you know how hard that would be to get the peanut butter out of my ass"
=D
When a man's fucking a girl in the ass and she shits on his dick. At the time he pulls out she puts peanut butter in her mouth and sucks his dick aka peanut butter cup!
Steven: "I got Tiffany to do the peanut butter cup last night."
Lee: "that's gross but you're legendary"
Steven: "her mouth was filled with peanut butter and " chocolate ".
Lee" Peanut butter cup!"