Rule 34 Dev - 2boys animal_genitalia animal_penis anthro ball_growth balls big_balls big_sheath blue_underwear canine clothed clothing comic dravu duo expansion gausswolf gay grey_underwear growth hyper hyper_sheath magic malamute male male_only mammal muscular muscular_male open_mouth penis penis_expansion penis_growth sheath sheath_growth suck_mcjones underwear underwear_only wolf yaoi|3397829424