[经济金融] How to talk to sons

Hi I'm Gina.
7 ]* H; W# ~" n$ m0 v* Z/ gI'm mother of two wonderful 10 years sons. Their father has left us 8 years ago.
7 s* i( X- O" Q( q3 I* f  Nrs238848.rs.hosteurope.deI have a question, maybe some of you can help me? ! J) W  B  b- X: Q
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?
6 U8 u: M* @% j. O5 S& m8 Q0 DIt really bothers me because i've found adult magazine in their room today.
$ \* W, b, u' M! }8 g( N1 Xrs238848.rs.hosteurope.deShould 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. " T. m8 u7 D* g( l
By the way, here is the photo of my sons: & }! n+ |  ^4 Y2 G
Happy mother of two great sons...