[经济金融] How to talk to sons

Hi I'm Gina. rs238848.rs.hosteurope.de; k/ L5 W# s' h% X* S' B4 y0 b4 ^
I'm mother of two wonderful 10 years sons. Their father has left us 8 years ago. 1 d* {  E+ V8 S8 l9 A! a) @5 }
I have a question, maybe some of you can help me?
" c! `. q- D2 OAt 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? ) K3 D% L. B5 Q; y: }* F
It really bothers me because i've found adult magazine in their room today. 人在德国 社区0 D8 g# r" Y, _$ |; _% X) o( z" d
Should I talk to them by miself or ask my brother to do it? : T% `: F/ k5 u8 V+ c: |
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Hope someone had the same problem and can advise me anything. ) J- k  ]$ L: {1 y6 {! l. ~
By the way, here is the photo of my sons:
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Happy mother of two great sons...