Rule 34 Dev - 2020 absurdres ambiguous_species animal_genitalia animal_penis anthro anus ass back_muscles baseball_cap biceps big_penis blonde_hair blue_eyes brown_body brown_fur butt_squish crouching equid equine equine_penis erection facial_hair fur furry genitals hat headgear headwear highres horse humanoid_genitalia humanoid_penis looking_at_viewer looking_back male mammal muscular muscular_anthro muscular_male nude penis ponytail puffy_anus quads spread_butt spreading squish thepurp triceps vein veiny_penis yaoi|4629598496