Welcome to the site!
Pretty much every aspect of living on the spectrum (or living with it) is somewhere on this site, good, bad, ugly or beautiful xD. Though your son is still unique to all the rest of us so will probably do or say things that are all his own xD.
A lot of people seem to come to sites like this because their real world surrounds doesn't contain anyone who knows about autism. I guess it just shows that the majority of people in the world still don't pay attention to what doesn't directly affect them, which is a shame since there are so many people with ASD and so many misunderstandings.
Your son is lucky that you're here to find out stuff and to support him.
I'm afraid I can't help with the skin picking though. I never did that one...