rule 34 anthro balls barazoku bear belly black bear body hair bondage bottle bound bovine cattle chains cob webs cock and ball colorful cot cum e stim electricity experimenting eyebrows facial hair orgasm goatee grunting happy trail heterochromia hooves switch lab coat laboratory leaking lightning liquids mad scientist male male only mammal muscular nipples orgasm orgasm control orgasm denial pain pecs precum pubes reed bull shaking shocked short size difference spots strapped down stretcher tattoo thick eyebrows trembling wheels yamato burr yamatopawa 2710607