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When you get swole solely from masturbation. While some may go to the gym to get huge arms, someone with porn gainz gets huge arms from touching themselves. It is like the natural shake weight of the body.
Guy 1: holy shit how to you get so swole

Guy 2: its all in the porn gainz man, just wank it 3 times a day to get killer guns like these
by Swellville August 05, 2017
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