As well as inter-species contacts and necrophilia... My favorite, however, is animals' use of tools for sexual gratification. I've personally witnessed a horse

As well as inter-species contacts and necrophilia... My favorite, however, is animals' use of tools for sexual gratification. I've personally witnessed a horse teaching her colt how to use a fence gate for a rub; it was not a simple trick either. The "animal cognition" people don't wanna hear about it.