FURVERT!

anal anal_penetration anthro anvil_position aquatic balls bodily_fluids clothing cum custapple demon dota duo erection fin fish from_front_position genital_fluids genitals hooves horn huge_thighs larger_male larger_penetrated larger_sub legs_up line_art lucifer_the_doom_bringer lying male male/male male_penetrated male_penetrating male_penetrating_male monochrome mostly_nude non-mammal_balls nude on_back penetration penis sex simple_background size_difference slark_the_nightcrawler smaller_male spread_legs spreading submissive thick_thighs valve valve_corporation white_background