Rule 34 Dev - abs anatomically_correct animal_genitalia animal_penis anthro balls biceps big_muscles biped casual_nudity equine_genitalia equine_penis eyes_closed flaccid fur genitals hair hands_behind_head male muscular muscular_anthro muscular_male navel nipples nude pecs penis pose raised_arm sheath shower solo spots standing thick_penis water wet sudonym equid equine horse mammal greyscale monochrome sketch|1982794485