Then heterosexual acts are sinful too.
You can’t say one way is, and one way isn’t.
Apparently that’s what Catholics believe. So gay animals are committing sins? Gay isn’t confined to people that “choose” to do so. It’s not much of a choice.
Unless, they are saying everybody is bisexual. That probably isn’t true either. Some people don’t belong to any sexuality label.
That’s one religion that won’t last, every new generation is smarter, soon under 1% of the world population will be Catholic.
Actually, nothing will last, a nuke will melt everybody in 2040. Oh wait, that might be Mars. So just stay here and get fried by global warming instead.