Rule 34 Dev - abs animal_genitalia animal_penis anthro balls biceps big_penis biped canine_genitalia canine_penis erection fur genitals kneeling knot looking_at_viewer male markings muscular muscular_anthro muscular_male nipples nude obliques pecs penis pose presenting sheath solo spots spread_legs spreading triceps vein tush_(artist) harlem_(character) canid canine canis domestic_dog great_dane mammal mastiff molosser sketch|1477935830