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Presturbation is the act of watching porn to get you horny enough to watch the really awful porn you need to get off because you're dead inside.

The term originates from Michael Swaim of Cracked.com
Guy 1: My girlfriend walked in on me watching porn the other day. Luckily I was just presturbating so it wasn't anything too nasty. A few minutes later and she would have seen my collection of loli midget amputee vore hentai. Presturbation saved my relationship.

Guy 2: You're dead inside, aren't you?

Guy 1: Oh, most definitely.
by That name is already taken September 02, 2011