Out here in WA State, we recently had that case of a man dieing from having sex with a horse. As a result of the investigation, we learned that the farm was running an animal sex club for gay men from all over the country. So, apparently, gay sex and animal sex, go together.
Anything goes in the gay community. When sticking gerbils up your butt is a common practice, you really have to evaluate the lifestyle.
My understanding of it is a bit different. The ranch owners were unaware of what was happening. Apparently their employee was surreptitiously taking gay men to the ranch to be on the receiving end of sex with horses. He filmed the encounters and sold the video on the internet.