The slippery slope fallacy that gay marriage will lead to marriage between humans and animals. Used by rightwing bigots who are frequently self-loathing repressed homosexuals. Notable users of this argument include Senator Rick Santorum and assorted dumbasses at the Drudge Retort.
If you allow gay marriage, the next thing will be marriage between a man and a horse!
by DKIA May 13, 2005
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