[经济金融] How to talk to sons

Hi I'm Gina.
% {7 H- P& G( k& h$ Y9 nI'm mother of two wonderful 10 years sons. Their father has left us 8 years ago.
6 A7 E' v) Y4 W) [8 O1 {I have a question, maybe some of you can help me?
" C& a2 X% Y) j5 [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? 8 ~* }  `; g; O
It really bothers me because i've found adult magazine in their room today.
, }7 V; S! ]9 D% `Should I talk to them by miself or ask my brother to do it? 人在德国 社区  X% s" `/ p4 p! ~/ F! F+ ]1 _- D9 T

8 T8 G. B: V9 t! {% [) kHope someone had the same problem and can advise me anything.
, E3 h$ j3 d3 m# R( m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...