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Anal intercourse between two heterosexual males, in which the balls of both participants do not come in contact of each other. Seperation of the balls may be as insignificant as a slip of paper to keep the act heterosexual and thus distinguish the buttfack from the buttfuck.

NOTE: the buttfuck between two men is a homosexual act in contrast to the buttfack.
Hugh Heffner and George Bush are free to buttfack as much as they want without losing their heterosexuality.
by George Freud July 12, 2005
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