[经济金融] How to talk to sons

Hi I'm Gina. ; H. L5 S% V# q: x
I'm mother of two wonderful 10 years sons. Their father has left us 8 years ago.
1 c7 X0 \2 @  u2 CI have a question, maybe some of you can help me? 6 \3 k3 a4 Y5 S0 G, T7 N
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? ) o% s, Z' A; w% `
It really bothers me because i've found adult magazine in their room today.
" Y+ w$ |0 }! d7 l1 k3 {人在德国 社区Should I talk to them by miself or ask my brother to do it? csuchen.de6 R  C  L- T6 {2 [8 J' X0 i
csuchen.de, O" X  y) \  f; Y1 C3 @/ T
Hope someone had the same problem and can advise me anything. 1 f: B  H1 H% F% f' |
By the way, here is the photo of my sons:
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Happy mother of two great sons...