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animal_genitalia anthro balls biceps biped black_and_white canid canine canis collar collar_only crossed_arms eyebrows fluffy fluffy_tail fully_sheathed fur genitals hair humanoid_hands looking_at_viewer looking_down male mammal monochrome muscular muscular_anthro muscular_male navel nude pecs penis richard_foley sheath simple_background sketch smile solo standing tail teeth white_background wolf