Of course it is. Why do you have a whole prefrontal cortex in your brain if it is not to use it to override your biological programming ?
Did you rape your wife? No, you asked her nicely. Because you used your cortex to override what is natural. Did you leave your wife after two years, as per your biological programming? Nope, because you chose the unnatural path of humanity. Do you kill everyone that annoys you? No, because you're making the choice to ignore your natural programming in favor of the unnatural laws of society.
Being human is being unnatural. Being gay is unnatural, as are most of our behaviours. So, yes, it is normal, it's a testament to humanity having evolved past our base biological programming...
Well, it is legal in some countries. But you can't compare homosexuality and bestiality.
For one thing, bestiality is purely sexual were homosexuality is emotional - most people can take pleasure in same sex intercourse, but it takes an homosexual to get emotionally involved in the long term.
But homosexuality, like all legitimate human relationships, demands consent. Animal can't give consent, so bestiality is a form of rape.
Yup. It's beyond nature. Like curing cancer, like space travel, like computers...