4_fingers alien alien_(franchise) anal anal_penetration animal_genitalia anthro chair_position claws collar cum duo erection from_behind_position hi_res interspecies ismar lizard male male/male male_penetrating master master/pet neverneverland nightcrauzer not_furry nude open_mouth penetration penis pet prehensile_penis purple_penis reptile scales scalie sex simple_background sitting size_difference slit smile snakehead404 spade_tail spread_legs spreading story story_in_description teeth toe_claws toes unusual_penis xenomorph