Rule 34 Dev - 2016 3_toes abs anal animal_genitalia anthro biceps blush claws clothed clothing cum cum_inside dragon duo erection genital_slit greyscale hair horn human husdingo male mammal monochrome muscular muscular_male nipples nude open_mouth pecs penetration penis scales scalie sex simple_background sketch slit teeth toe_claws toes tongue torn_clothing transformation yaoi|3179043424