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!"