[经济金融] How to talk to sons

Hi I'm Gina.
" ]# D; Y  B/ C& U6 swww.csuchen.deI'm mother of two wonderful 10 years sons. Their father has left us 8 years ago. 人在德国 社区- ?% ^9 I0 \' J( T8 ?8 T% X
I have a question, maybe some of you can help me?
7 [7 b, W7 }6 i3 y5 QAt 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? , }# H/ T( U9 s/ D0 T5 K/ ]
It really bothers me because i've found adult magazine in their room today. 0 a) F) E0 U% Y- P8 r- Z
Should I talk to them by miself or ask my brother to do it? " O; D+ p, _$ }$ T1 B1 [

0 p( I; Z0 ^( _) ?( r& }Hope someone had the same problem and can advise me anything.
2 j8 N7 ]3 S3 Y7 n% |By the way, here is the photo of my sons:
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Happy mother of two great sons...