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When a guy finishes and still can't stop jerking off like a lunatic, making his nuts feel like they're on fire.
He came like a waterfall and still didn't stop. Why? He was doing machine gun masturbation.
I told him he was done, but he just said, 'No way, I'm gonna finish this like a beast.'
He was crying from the pain, but he still kept going. Machine gun masturbation, baby.