I din't find this disturbing at all. I was expecting some nasty horse sex. For those who wonder, no, it's not yaoi, it's sightly shonen-ai with a pinch of erotism. There are only 2-3 scenes where it is 'sketched' the main sex scene, but nothing more. It was indeed a different kind of story but nostalgic and... terribly sad. Immortal (or almost) creatures that it is said they were real must very lonely. Their beloved die, one after another, so they rather choose to be alone.
Equus