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2014 abs anthro ape balls biceps big_muscles biped black_body black_fur black_hair black_nipples blush brandon_summers erection eyes_closed funeral-paws fur genitals gorilla grey_body grey_fur grey_penis grin hair hands_behind_head haplorhine humanoid_genitalia humanoid_penis lying male mammal muscular muscular_anthro muscular_male nipples nude on_back pecs penis pose presenting primate pubes raised_leg smile solo spread_legs spreading teeth vein