[经济金融] How to talk to sons

Hi I'm Gina. ! A6 r. u' R5 f- d& ?
I'm mother of two wonderful 10 years sons. Their father has left us 8 years ago. ) s/ b: V, d4 g# x
I have a question, maybe some of you can help me?
; v3 x3 b; {4 B# r' v8 {4 a% Q% hAt 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?
% L. c) L3 A' T4 N人在德国 社区It really bothers me because i've found adult magazine in their room today.
9 K- S, g8 F6 Z4 X% R9 x. v  ^Should I talk to them by miself or ask my brother to do it? 人在德国 社区2 A. O8 O  M5 V$ X- x5 Y
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Hope someone had the same problem and can advise me anything. 8 B' k8 d3 d5 w
By the way, here is the photo of my sons:
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Happy mother of two great sons...