[经济金融] How to talk to sons

Hi I'm Gina.
' n# d1 Z4 @# f2 }# `# B5 p1 @人在德国 社区I'm mother of two wonderful 10 years sons. Their father has left us 8 years ago. $ @7 h; r. _( i+ J
I have a question, maybe some of you can help me? 3 c8 L# W% D+ n! a0 m7 [
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? : f; V' ^  p5 g& P7 ~0 Z6 p
It really bothers me because i've found adult magazine in their room today. . [# L5 W; s9 e. [2 y5 s( K
Should I talk to them by miself or ask my brother to do it?
0 p' [. D& E; m. _4 h$ i* C, ?
. s' C% O/ O1 ~- AHope someone had the same problem and can advise me anything.
3 r6 z- L2 L' V# h3 W' H7 _8 o人在德国 社区By the way, here is the photo of my sons: - i  T) {& p" H% k: g% h1 t0 h2 t
Happy mother of two great sons...