[经济金融] How to talk to sons

Hi I'm Gina.
# g4 X3 d  b% |! I/ m3 {! cI'm mother of two wonderful 10 years sons. Their father has left us 8 years ago.
9 J0 L; K/ k: H4 G$ M+ M+ @人在德国 社区I have a question, maybe some of you can help me? - ?) w5 g9 S7 b% `! f
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?
/ P2 `0 F$ C/ k* F, Y* c, N/ U, _It really bothers me because i've found adult magazine in their room today. - b9 V  v& A$ F* @6 d
Should I talk to them by miself or ask my brother to do it?
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, W+ r2 S2 G" d6 J$ C: h/ u* uHope someone had the same problem and can advise me anything.
! @3 N# r/ o) @3 m1 J2 GBy the way, here is the photo of my sons:
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Happy mother of two great sons...