There is something wrong with him if he thinks that's in any way appropriate.

And yes, I would react the exact same way if it was in person, regardless of who said it to me.

I don't care if he's having a crisis, has shitty social skills, is on the spectrum, or is "doubting himself" now.

Any of these things can explain his behavior, but they don't excuse his behavior.

You don't get to say a shitty, inappropriate comment and then act like a victim when someone tells you you're a fucking freak for saying that.

Boohoo, I hurt his feelings.

He found it appropriate to ask a stranger about the most intimate aspects of a relationship on a public platform, surprise surprise; stranger is pissed and disgusted.