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Pre-Teens for the Ethical Treatment of Animals
Wikisimpsons - The Simpsons Wiki
Pre-Teens for the Ethical Treatment of Animals (P.T.E.T.A.) is an animal rights organizations for pre-teens.
History
Homer and Lisa was on a protest against animal testing at a Springfield Labs as part of Pre-Teens for the Ethical Treatment of Animals, where monkeys are made to smoke cigarettes and pigs are smothered with make-up.