The male with his erected penis will rotate his hips to the left and right at a constant motion slapping the woman across the face.
The Girlfriend: Yay! I've been waiting a long time for this!
Bill: Ow... My penis hurts from the weed wacker...
Jim: What did you do?
Bill: Don't worry about it.
I got so fucking stoned last night.
Yeah yo. I got horny then i beat the meat.
Nice yo (:
Its called Weed Wacking in other words imma Weed Wacker!