Plumbing. Identity. Orientation.j
The first one you’re born with. Male, female, or intersex. The others are a choice, on some level at least.

So why don’t we just accept people for whichever combo of these three aspects they express?

It boggles my mind too. But to each their one I suoose. Got no issue with folks who see and feel things differently than I do. Diversity is fun.