Oh, man, it's such a simple word, but I'm having a hard time thinking of a plot. Do you read graphic novels? Regardless, read Sex Criminals by Matt Fraction. That might tide you over while someone writes an awesome #descriptionsonthespot for your word. Also, check out the #secret-writer channel, loads of sex stories there.
I'm really intrigued by the challenge because I haven't written about sex before. I'll try to find time to get to this word but I'd bet other writers would be able to write a way better story.