[gmku]

Well put.

I almost think it's one of those things that's best left to take its course. That is, don't overplay your concern. Answer questions when your son brings them as best you can, pay attention to his concerns, but don't allow yourself to dwell on it as a "problem." As Bytor says, kids have an uncanny knack for working out things for themselves--with a little guidance when necessary, of course.