4_fingers anthro anus armwear back_boob bat_wings beauty_mark big_breasts big_butt breasts butt butt_grab chiropteran clothing digital_media_(artwork) dingoringo30 ear_piercing elbow_gloves erection eyelashes eyeshadow faceless_male female fingerless_gloves fingers gangbang gloves grey_background greyscale group group_sex hair half-closed_eyes hand_on_butt hand_on_penis hi_res huge_butt human humanoid_penis legwear makeup male male/female male_penetrating mammal membranous_wings mole_(marking) monochrome mostly_nude open_mouth penetration penis piercing rouge_the_bat sex sharp_teeth short_stack simple_background sketch sonic_(series) teeth thick_thighs thigh_highs tongue tongue_out vaginal vaginal_penetration vein veiny_penis voluptuous wide_hips wings