Rule 34 Dev - abs anthro balls biceps big_balls big_muscles big_penis fur genitals half-erect humanoid_genitalia humanoid_penis looking_at_viewer macro male muscular muscular_anthro muscular_male nude pecs penis smile solo furious_(artist) stan_melgar canid canine canis domestic_dog german_shepherd herding_dog mammal pastoral_dog 2015 hi_res|3083674300