[经济金融] How to talk to sons

Hi I'm Gina.
& B: H$ @( |; x6 q- x, aI'm mother of two wonderful 10 years sons. Their father has left us 8 years ago.
5 }* _9 v: _. O% W( n% K% aI have a question, maybe some of you can help me? 3 R- E8 N6 c1 y* q) q0 j
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?
3 H  O7 F, C& q/ L: ?5.35.249.64It really bothers me because i've found adult magazine in their room today. 5.35.249.647 k% ?* d0 x- A% I& D" l- n3 O4 A
Should I talk to them by miself or ask my brother to do it? % ~: D  Q5 A8 @
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Hope someone had the same problem and can advise me anything.
/ ^, ]: i1 I/ ]- D' DBy the way, here is the photo of my sons: 6 \) j+ r5 o; S5 S) k7 d& @
Happy mother of two great sons...