Rule 34 Dev - 2020 abs anthro big_bulge big_muscles black_nipples bulge canid canine canis clothed clothing greyscale hi_res jockstrap looking_at_viewer male male_only mammal monochrome muscular muscular_anthro muscular_arms muscular_male nipples pecs silver_fang solo topless_male underwear underwear_only wolf zawn|4834948200