This was me! Complete with annoyning everybody and my wife putting her hand on my leg to make me notice I'm doing it.

I did eventually "break the habit"[1] by paying undue attention to my leg for years and intentionally stopping when it started. What I don't know is if it would have gone away on its own, or if my effort fixed things.

[1] It comes back when I'm unusually tired or stressed, though.