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3:4 abs animal_genitalia animal_penis anthro balls biceps canid canine canine_genitalia canine_penis chest_tuft claws erection faceless_character faceless_male fox fur genital_focus genitals hermesdidit hi_res knot lying male mammal muscular muscular_anthro muscular_male nipples nude on_back pecs penis sheath simple_background sketch solo tuft