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!"