When you take a shit, and while still on the can, jerk off. It's best to wait until the shit has
left your body before you begin yankin'. This maneuver is a real
time-saver. It works best if you can manage to bring a laptop or other source of
porn in to the bathroom with you.
Girlfriend: So now that you're out of the bathroom, do you want to have sex?
Boyfriend: Nah, I just took a powershit so I'm good to go.
Girlfriend: UGHHHH. *turns on vibrator*