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anthro anus balls big_butt brown_anus butt equid equine fart fart_cloud fart_fetish farting_at_viewer fur gassy genitals hi_res hooves horse male mammal multicolored_body multicolored_fur nude penis presenting presenting_anus presenting_hindquarters raised_tail skaro slightly_muscular slightly_muscular_male smelly solo spread_butt spreading tail unknown_artist