[经济金融] How to talk to sons

Hi I'm Gina.
/ N. r1 [3 p; A$ ~- K: h$ g$ ]5.35.249.64I'm mother of two wonderful 10 years sons. Their father has left us 8 years ago. 5.35.249.64; r* Y3 l( ]7 d* ^+ Y5 i- [
I have a question, maybe some of you can help me?
6 u( a( Z0 P/ J8 a2 F6 o+ }人在德国 社区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; A6 `: T1 A8 i
It really bothers me because i've found adult magazine in their room today. % n8 U1 E' e( B
Should I talk to them by miself or ask my brother to do it?
% s& V& R+ ]+ f8 G! q5.35.249.64 5.35.249.64- M1 S; m  t: a' }6 ~% R" J
Hope someone had the same problem and can advise me anything.
9 }: x% j& ^/ d- l# B$ N5.35.249.64By the way, here is the photo of my sons:
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Happy mother of two great sons...