Rule 34 Dev - 2023 animal_genitalia animal_penis balls balls_expansion becoming_erect better_version_at_source blush bodily_fluids bouncing_balls bubble_text cold-blooded-twilight cute_fangs cutie_mark english_text equid equine equine_balls equine_genitalia equine_penis exercise expansion feral friendship_is_lust_(fanmade_mlp) friendship_is_magic genital_expansion genitals glowing glowing_eyes gynomorph hasbro hi_res hooves horn intersex mammal meme my_little_pony nervous no_nut_november oversized_balls penis penis_tip presenting rule_63 sheath simple_background solo sweat sweat_pool sweatdrop sweaty_balls sweaty_genitalia text twilight_sparkle_(mlp) unicorn|9923502456