[经济金融] How to talk to sons

Hi I'm Gina.
! }: ]' _" i, K0 k. Y; {7 {( y3 @www.csuchen.deI'm mother of two wonderful 10 years sons. Their father has left us 8 years ago. , i$ g: P. o, a" \# j5 C
I have a question, maybe some of you can help me?
4 E* d; r0 k9 H% pAt 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?
# n: E) S7 W0 S# S* WIt really bothers me because i've found adult magazine in their room today.
: z* n5 O$ A9 a1 Y% u7 oShould I talk to them by miself or ask my brother to do it?   ^" |7 b! @  I5 C
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Hope someone had the same problem and can advise me anything. 人在德国 社区' y+ D0 E+ ~) H0 ?/ X  f: n
By the way, here is the photo of my sons:
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Happy mother of two great sons...