That is so sick 
Possibility the strangest human behavior I have ever seen was the video of the man who died of internal injuries from having sex with a horse and filmed by the owner of this [business???] mentioned in the link.
This owner on film precipitated in the death of his {friend} one can see him in fact placing the horses organ into the mans back side and hear the dieing yelps as the man was disemboweled.
Stupid me, I thought this man had been charged with murder, but I guess the information he has on drug running is more important then a human life.
How do people get to this point in life that sex with an animal is the only way they can get relief, what has lead up to an adult needing this form of relief.?
Just how rampet is this behavior with in society.??
