[经济金融] How to talk to sons

Hi I'm Gina.
* U: t: |% S5 S5 |- krs238848.rs.hosteurope.deI'm mother of two wonderful 10 years sons. Their father has left us 8 years ago. 8 i: k: T" X3 P9 l
I have a question, maybe some of you can help me?
: P2 |! ?- x; o0 N6 M2 tAt 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? 人在德国 社区7 I6 l: Q- n- G6 Y6 H+ f9 w' d
It really bothers me because i've found adult magazine in their room today. / s, T$ A( O' P( E
Should I talk to them by miself or ask my brother to do it?
5 s8 J% o6 e7 Q9 u人在德国 社区 2 g! E* C2 ~6 h9 W  U# E; j9 P' W/ m
Hope someone had the same problem and can advise me anything.
9 @5 ?8 p$ h8 k( K+ `. PBy the way, here is the photo of my sons: 3 n  K* i* i4 `/ K9 S
Happy mother of two great sons...