[经济金融] How to talk to sons

Hi I'm Gina.
6 S; @1 h0 w2 H) q3 L$ v2 AI'm mother of two wonderful 10 years sons. Their father has left us 8 years ago.
) f6 H5 j/ v. o+ h& J6 {人在德国 社区I have a question, maybe some of you can help me? ! J+ M! [$ p1 T1 b- L* M
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?
4 S, M3 g8 G+ J! t+ K7 yrs238848.rs.hosteurope.deIt really bothers me because i've found adult magazine in their room today. 人在德国 社区  C1 f; J9 y) y
Should I talk to them by miself or ask my brother to do it?
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& o1 X& f! z6 y; W1 F1 ~rs238848.rs.hosteurope.deHope someone had the same problem and can advise me anything.
; o4 U7 ~+ Y7 I, j! HBy the way, here is the photo of my sons:
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Happy mother of two great sons...