When you are laying on your back while jerking off, but are too lazy to get up, at the same time you dont want to get cum all over yourself, this is what you do. when you are about to cum put your opposite hant over the dick hole and press hard sothe cum doesnt go anywhere besides your hands and all over your dick.
(Person 1) Dude! theres cum all over your body. What the hell happened?
(person 2) What could of I done? I couldnt get up because it felt so good.
(person 1) You dumb ass you should have face palmed that shit