This is really interesting! I've only read part way, but want to add my story before finishing reading. I am name changing, because this is very personal.
DH is not diagnosed, but we are fairly sure he would fit the criteria.
We were in an shared interest group, I was dating someone else. He found out we'd split up and sent me a letter (30 years ago) saying he couldn't live without me.
It got a bit complicated but we ended up together and married 3 years later.
The upsides- loyalty, reliability, financial stability.
The downsides, he needs quite a lot of coaching on how to handle the kids. He's a great dad but can be inclined to shout and stamp about things that really aren't that important. He was superb when they were babies and tots. Slightly unreliable if they were ill- he doesn't check in on people to see if they are ok and he hates 'making a fuss' so I was afraid he wouldn't seek help if a poorly child got very ill while I was out.
Unfortunately he doesn't process a lot of what I tell him- he operates on rails and can't easily make changes. So sex was awful. He has certain sensory issues, and I felt like a sex toy- he'd still do something after I said it hurts me not because he's an arse but because he'd get carried away. He's got no sensitivity, it's a bit all or nothing.
He also doesn't pick up on things- he's usually caught up in his own thoughts so can miss that I'm sat crying next to him.
We've worked our way through things now, I was very lonely for the first 15 odd years.
You have to be very up front, don't let anything go, and spell it out. I was brought up not to ask- it was rude and demanding to ask for things. Unfortunately unless I ask DH has no idea I want something!