So how does the bull learn he performs better with another bull? His peers get him drunk and throw him in a closet with another bull? He decides he no longer likes cows? The farmer is somehow enticing the bull to turn gay, like maybe blasting Y M C A non-stop through out the barn? Animals act on instinct and learn from their actions. I've never seen another dog perform oral sex on himself and I'm thankful for that. But, how does an animal learn that is pleasurable if it wasn't instinct? Why would a bull mount another bull if it wasn't instinct? Cleft pallets vs gay...considering I know more gay people than people with cleft pallets (ZERO) my observations say you are wrong.