@hereforthezoo Do you really think that an animal with a brain almost the same as a toddler thinks "Holy crap, that human is hot?" No. If animals had sex for fun, they wouldn't only mate during their most fertile stage.
@StoriesZoo The difference between humans and other animals is that humans know right from wrong. They know better than to mate with other species. An adult dog's brain is about the same as a toddler's. They don't have a well-developed prefrontal cortex.