http://en.wikipedia.org/wiki/Opponent_process_theory
posted by videosiftbannedme 1 decade 6 years 3 months 3 weeks ago • 11,337 viewshttp://en.wikipedia.org/wiki/Opponent_process_theory
posted by videosiftbannedme 1 decade 6 years 3 months 3 weeks ago • 11,337 viewsNot yet a member? No problem!
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