Rule 34 Dev - abs animal_genitalia animal_penis anthro athletic balls bench biceps big_muscles big_penis biped black_body black_fur brown_hair canine_genitalia canine_penis casual_erection casual_nudity clenched_teeth erection exercise fur genitals green_eyes grin gym hair holding_object knot long_hair lying male muscular muscular_anthro muscular_male nude nude_workout on_back on_bench pecs penis simple_background smile solo tail teeth thick_penis weightlifting weights workout easyspark yamatoiouko yamato_iouko canid canine canis mammal wolf|1193700305