Rule 34 Dev - 2boys abs ass barazoku belly biceps big_penis big_tail black_hair blue_background bulge canine clothing drooling duo erection feet flexing fox furry grey_fur grey_hair growth huge_ass huge_cock huge_muscles husky hyper kokoro-doll kouya_(morenatsu) macro male male_only mammal morenatsu motion_lines muscular necklace nipples one_eye_closed open_mouth paws pecs penis penis_awe presenting saliva short_hair simple_background sirus size_difference smile speedo standing swimsuit tail testicles text thick_thighs tongue topless underwear veins veiny_penis wide_hips wink yaoi|2509862952