Damn right you should, instead of building up your own personal mini-East Germany around him ..
Then it's hardly personal, is it ?
In order to learn children how not to get hurt by life you need to teach them about life !
Naturally, if the kid is not allowed to know what a penis is,
you will find it hard to teach him that he shouldn't
show it to internet-uncle Bob ..
Besides, he probably already knows those words he's not allowed to see
but since he sounds like a smart kid he's to clever to say them when you guys listen ...