When an individual, usually a
guy, will get soooo into a
masturbation session that they'll get completely naked, touch their bunghole, and
even rub their own nipples. They might even have sex with a couple of pillows or cushions to simulate a real sex experience.
"
Dude, I'm going to go and jack-off. Wait, I
think I'm due for a
sexy-time jack-off. I'm excited!"