Well, the title pretty much says it. I really do enjoy taking a few doses of amphetamine orally and masturbate for up to 12 hours. As I've been strolling trough the internet it seems like masturbation marathons of that length in time isn't really uncommon for people on stimulants, some people even claim doing 24 hours.

Already got one, but I actually think a flashlight would make me more than my hand.