[经济金融] How to talk to sons

Hi I'm Gina. rs238848.rs.hosteurope.de. A% s" a' \% C
I'm mother of two wonderful 10 years sons. Their father has left us 8 years ago. * j/ ^+ [) X/ c% Y) D
I have a question, maybe some of you can help me? " H+ L7 M) h  P& c/ ^1 [& Q6 s
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? 人在德国 社区7 M" w5 A! U, x5 G; r" q" w+ E
It really bothers me because i've found adult magazine in their room today. 人在德国 社区9 l, D7 Q& d' `( G+ G3 r
Should I talk to them by miself or ask my brother to do it?
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Hope someone had the same problem and can advise me anything.
4 t$ i) n) m* \5 F" t/ n人在德国 社区By the way, here is the photo of my sons:
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Happy mother of two great sons...