Thanks for all the responses.
For my girl, I leave it to my wife.
I thought Big Girtha will first teach his son clamping.
Thanks Wally, your links deserve a place in my son’s bookmark.
When he told me he started masturbation because his friends told him the stuff, I immediately ask him to check with jackinworld, I want him to do it right. I am very nervous that he will mis-interpret what he will see in porn, so I will just slight mention TP when he is about 18, and let him judge by himself. (I hope this site will still exist for my youngest son).
I didn’t grow up having bath with my dad either. No, I don’t feel embarrass or weird bathing with my sons. It helps them not to feel embarrass to have nude jacuzzy in Japan last month, and if they have chance, they will enjoy nude beach somewhere.
For me, being a parent it’s more important to pro-actively discuss with them before they do something wrong.