abs animal_genitalia animal_penis anthro armpit_hair balls biceps big_balls big_penis body_hair brown_body brown_fur brown_hair equine_genitalia equine_penis flared_penis flexing fur genitals gym hair huge_balls huge_penis looking_at_viewer male nipples pecs penis pubes solo solo_focus vein veiny_penis ascar equid equine horse mammal tail absurd_res hi_res