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A bunch of guys take turns bonking the same chick, hoping she gets knocked up so they can all fight over who gets to be the dad. The winner gets to be the dad, and the rest of them will spend the rest of their lives making fun of him.
My cousin got stuck with the dad role because he was the only one who didn't forget to put on a condom.
My uncle got beat up by all the other guys because he was the dad.
My aunt got pregnant by three different guys, and only one of them showed up to the hospital.