[经济金融] How to talk to sons

Hi I'm Gina.
) g; @, X9 Q+ A# F# H人在德国 社区I'm mother of two wonderful 10 years sons. Their father has left us 8 years ago.
1 ^3 y( G* J8 O. Z  M( j/ U, K! B% XI have a question, maybe some of you can help me?
& S& S/ v" }2 T( M7 s人在德国 社区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? & B/ v9 F2 U% K" ~+ d5 k
It really bothers me because i've found adult magazine in their room today.
3 {: A3 O% f6 ?Should I talk to them by miself or ask my brother to do it? - Q2 v; N' P0 j" @1 d
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Hope someone had the same problem and can advise me anything.
: ~! x( I( O/ Q. m% A; W: r7 ~csuchen.deBy the way, here is the photo of my sons: 人在德国 社区+ P. q' c" T3 S3 a
Happy mother of two great sons...