Is It True? (Spoiler)
... that the guy has sex w/ the horse? My cousin told me that.
The inner machinations of my mind are an enigma.share
nope...that's completely untrue
I would suggest watching the play (I'm sure the movie is just as good, or so I"m told), its really good, and it has a lot of meaning behind it.
It's not necessarily true but it is also not completely false. The boy has a fantasy love for horses. For it is a love, he actually finds in horses the spirit that Mr. Shaffer calls Equus, a deification of the horse as a life force, and the boy has entered realms of passion and, in a sense, reality, that his own humdrum existence has never known.
At one point in the play/movie the psychiatrist says, "That boy has known a passion more intense than any I felt all my life."
He does not excuse, of course, the horrific results of that passion, but he is sheerly impressed by the Dionysiac strength of its existence.
So the audience cannot conclude that he does share sexual feelings for the horse but we cannot rule it out either, it is just that his love for them is on a very similar level.