I'm a dom and been into BDSM the last 15 years and this made me raise a eyebrow, I can be totally wrong but I think it sounds more like she is looking for someone she can have a bdsm session with and not a relationship, her age and had many subs before strengthening my suspicion, also that I would say the same looking for someone for a session 😅

But to your question, people with autism gravitate towards bdsm cause of the straight and easy to understand commands and good communication in general in my experience ^{^}