Belz...
Fiend God
There you go. You do know what being a man "feels internally" like. It's that.
It's nothing, then?
See, that's the issue. I'd wager that most people don't feel "like" either a man or a woman. They simply have no dysphoria about their bodies. Those who do, can resolve the problem via transition, which I think the government should at least partially pay for. But either way, you can't say "but I feel like X" because it's meaningless. "Man" and "woman" were never defined as something you felt like.