Yes, I thought maybe cos autistic people get obsessed ("attached") with things/behaviors, they might similarly get obsessed over specific individuals, and so have more oxytocin receptors. But there's also the stereotype of them as cold and calculating, like Affleck's The Accountant movie, so it could go either way.

The way you explain it is good! I read Helen Fisher's Why We Love book many years ago and I think that's when I first became familiar with the importance of oxytocin in relationships and attachment. To a great degree, we really are our hormones!