16:9 3d_(artwork) anal anal_penetration anthro anvil_position armband belly biceps bowser bracelet crown digital_media_(artwork) dukesmith3d duo erection facial_piercing fin fish from_front_position genitals glans hair headgear hi_res horn humanoid_genitalia humanoid_penis jewelry kneeling koopa leather legs_up looking_pleasured lying male male/male male_penetrated male_penetrating male_penetrating_male marine mario_bros musclegut muscular muscular_male nintendo nipples nose_piercing nude on_back open_mouth pecs penetration penis piercing red_eyes red_hair scalie septum_piercing sex shark sharp_teeth simple_background slightly_chubby smile spiked_armband spiked_bracelet spikes teeth tongue tongue_out widescreen