Interspecies love occurs everywhere. I don't see the crime in it. There's even a video on youtube about a dog loving a tiger in a zoo.
as sapient beings who have come to dominate this planet, I feel like we should all agree that just because it happens in nature, it doesn't mean you can diddle the nearest animal for the sake of diddling when there are seven billion other people you can diddle
tldr: keep your snake in your genus