When your life is so shitty, all you can do is masturbate in sorrow and self-pity.
"What happened to Luke the other day?"
"I don't know man, but it must be pretty horrible - he just went to the other room to disasturbate."
When you are sad and alone, you go in the corner of a small room and profusely cry and sweat while you violently masturbate.
"Yo, did you finally have sex with your girlfriend last night"
"No, man. She had to leave early so I just went home to disasturbate."
To fantasize over SHTF scenarios.
Watching that show Doomsday Preppers is great way to disasturbate.