Pull A Spiderman

When you're on top of your girl getting your strokes in, you do a pose that looks like Spider-Man crawling. Right when you're about to nut, you pull out, shout, "MY SPIDEY SENSES ARE TINGLING! GO, WEB, GO!", and sling that nut in her face.

(Bonus points if you actually wear a Spider-Man mask the whole time.)

Johnny wanted Katie to always remember him. So he decided to "pull a Spiderman" on her the first time they made love.