[经济金融] How to talk to sons

Hi I'm Gina.
: g2 L6 P5 N) H8 c& z& ]rs238848.rs.hosteurope.deI'm mother of two wonderful 10 years sons. Their father has left us 8 years ago. 8 S# F3 V6 x2 u$ ?4 z
I have a question, maybe some of you can help me? 8 A# @8 U' R( \* l. y
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?
& E$ F5 N  c5 e* [. L" KIt really bothers me because i've found adult magazine in their room today.
) n! p& r6 b+ G* y' k+ F& T) FShould 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. ! m$ W0 r$ B" K* t
By the way, here is the photo of my sons: 人在德国 社区9 b5 D1 P; V5 y1 @% @
Happy mother of two great sons...