[经济金融] How to talk to sons

Hi I'm Gina.
. f3 {  F) C9 f/ T- m# fI'm mother of two wonderful 10 years sons. Their father has left us 8 years ago. 人在德国 社区/ q; ~2 R; U, _. r
I have a question, maybe some of you can help me?
$ ~' s: B" N& p3 U6 F9 l; d9 c+ ?; rAt what age should a parent teach their son about ‘sex’ if there is no father around or would it be better for the kid to have a male family member to do this? csuchen.de6 b- {; X; ?" W6 w: D4 H
It really bothers me because i've found adult magazine in their room today.
" \) M1 B& O6 h% M7 P( \  j% ~Should I talk to them by miself or ask my brother to do it? " x$ K: m" X! g  y
" M$ e( _; T! k8 i" @
Hope someone had the same problem and can advise me anything. 1 O: k9 |. d. U
By the way, here is the photo of my sons: : @9 ^# f- V: H. T
Happy mother of two great sons...