[经济金融] How to talk to sons

Hi I'm Gina. % d+ C' s0 Z1 b8 G6 T
I'm mother of two wonderful 10 years sons. Their father has left us 8 years ago.
# `, P" y5 H+ O) y9 |0 ~0 J& I* }' cI have a question, maybe some of you can help me? 人在德国 社区; X: ^( A' z$ W3 e. {4 e( u
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?
. D. E- y6 ^) rIt really bothers me because i've found adult magazine in their room today. 5.35.249.64# ^+ T' q8 X% s6 m
Should I talk to them by miself or ask my brother to do it?
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3 J. a. K4 O7 Q2 ]0 `1 rHope someone had the same problem and can advise me anything.
" ]% q) h5 M4 L0 X1 t( ^7 t$ \By the way, here is the photo of my sons:
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Happy mother of two great sons...