[经济金融] How to talk to sons

Hi I'm Gina.
1 U6 b+ S6 [* l; KI'm mother of two wonderful 10 years sons. Their father has left us 8 years ago. 8 B( |8 @! p$ V$ [4 N, ^
I have a question, maybe some of you can help me? 人在德国 社区) l5 {* d. M* ]. d) c
At 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?
' c4 ^7 F4 K$ [3 y: h5 P, i' g4 C, ?人在德国 社区It really bothers me because i've found adult magazine in their room today. 人在德国 社区2 ~) w4 E8 L; v( V* K% W& T
Should I talk to them by miself or ask my brother to do it?
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Hope someone had the same problem and can advise me anything. csuchen.de+ k4 X% `. z7 I, K
By the way, here is the photo of my sons:
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Happy mother of two great sons...