I'm not any kind of expert on Schizoid (nor Asperger's, which I noticed you asked about in . At times I've considered the possibility that I might have one or the other but if I do, it doesn't seem to bother me or get in my way any more than having blue (or brown) eyes would.

It seems to me that that could occur in someone with or without schizoid personality disorder. I think if I noticed someone (including me ) doing that, it would say to me only that they were tense or otherwise uncomfortable at that particular time and in that particular situation.