[经济金融] How to talk to sons

Hi I'm Gina.
, Q' x! }# f$ o7 Q/ V人在德国 社区I'm mother of two wonderful 10 years sons. Their father has left us 8 years ago.
: F' ^8 y$ O" e$ e  s$ `人在德国 社区I have a question, maybe some of you can help me? 5 o5 R5 V$ c6 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?
" z) F% s! `8 |3 t6 f/ ]1 xIt really bothers me because i've found adult magazine in their room today.
0 y  D5 j+ m' [( _* s6 SShould I talk to them by miself or ask my brother to do it?
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. J& E* d# W- g1 O0 LHope someone had the same problem and can advise me anything.
  r2 p2 U: Z! w5 E& l1 d$ trs238848.rs.hosteurope.deBy the way, here is the photo of my sons: 人在德国 社区0 {5 f) r) Z) t: X2 O
Happy mother of two great sons...