Equus (1977)

Peter Firth blinds horses with a metal spike in Equus (1977), which gets him on the couch with head-shrinker Richard Burton. Firth, it turns out, is a bit of a horse freak. That is, he gets freaky with the animals, riding them naked until he ejaculates. But he's sensitive and cuddles with his hay-munching lovers after the act, rather than falling asleep like a pig. But when a two-legged ride comes his way in the alluring form of Jenny Agutter, Firth can't get it up, not even after Jenny strips down to galloping jugs, bareback ass and a clear and deliciously gratuitous shot of her furry fields. No, we're not horsing around. This one's got to be seen to be believed--so put your feet in the stirrups and your hand on your flesh crop and hold on tight.