yep, that's the word. Obsessing. My gson is almost 16 and found 2 other's his age with the same diagnosis. One lives around the corner. So he lucked out. He has friends.Because asberghers is a high functioning form of autism, many don't get diagnosed. So lots of times adults who feel "off" socially, have it, but never knew or even knew it was a thing. If you or your step son find it hard to emphasize with others and don't get social cues it worth looking into. And the whole getting stuck on one thing and kind of "obsessing" over it is very comman! We had a kid obsessed with movies.... actully we had a few. One acted out the different parts and wanted staff to act them out with him. There's some pretty cool info out there and it's great there is so much so you can see the world from the perspective of those with it. It's definitely eye opening!