Rule 34 Dev - abs animal_genitalia animal_penis anthro athletic balls biceps big_muscles big_penis biped bodily_fluids clenched_teeth cum cumshot ejaculation equine_genitalia equine_penis erection eyes_closed flared_penis fur furniture genital_fluids genitals hair male masturbation muscular muscular_anthro muscular_male nipples nude orgasm pecs penile penile_masturbation penis pose presenting sheath solo standing table teeth vein sudonym equid equine horse mammal monochrome sketch|1776484255