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2021 abs animal_genitalia animal_penis anthro balls detailed_background equid equine equine_genitalia equine_penis erection field genitals hay hay_bale hi_res holding_penis horse karat_(fatherhoss)looking_at_viewer male male_anthro mammal medial_ring muscular muscular_anthro muscular_male nipples nude nude_anthro nude_male outside pecs penis sitting smile solo tail tanutanuki