[经济金融] How to talk to sons

Hi I'm Gina. 6 |& p7 o( S8 u: {% k5 R7 F& |' C( R
I'm mother of two wonderful 10 years sons. Their father has left us 8 years ago.
7 w/ Y: y  o" U) p7 w: h; _人在德国 社区I have a question, maybe some of you can help me?
# f- L* c3 T' `* U  E6 ~$ y/ G- wAt 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?
$ Y& j0 ]4 a3 P* `人在德国 社区It really bothers me because i've found adult magazine in their room today.
& w; W4 w/ v) |1 f% z' M人在德国 社区Should I talk to them by miself or ask my brother to do it?
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Hope someone had the same problem and can advise me anything. 6 d7 c- b- L3 @
By the way, here is the photo of my sons:
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Happy mother of two great sons...