A Johnson Outboard
The woman grabs her man's meat and starts humping it like a goat. He goes off like a firecracker, face-deep in her chest, making a mess like a drunk sailor.
My cousin did this in the middle of a family reunion. The whole table got distracted by the show.
My brother did it in the movie theater. The guy behind him got sprayed with cum.
My friend did it in the mall. The security guard came over and told him to stop.