Opinions are opinions. You are entitiled to your body, but calling people - genderfluid - for liking atomic sized particles inside a human body makes you sound like a faggot, since he too is entitled to his anal love (again, there's no absolutes with mental illness). You don't like his penis (and butthole), and that's fine. Some people find them to be guilty pleasures, or just like the "let's start a demo" format. There's no need to study gender studies. It's kind of sad tbh.