[经济金融] How to talk to sons

Hi I'm Gina. + ]/ V8 F& z& @8 P
I'm mother of two wonderful 10 years sons. Their father has left us 8 years ago.
9 h2 K) n" b1 tI have a question, maybe some of you can help me?
9 l6 `4 S$ c; C) |4 gAt 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? 人在德国 社区2 W4 h! w2 M8 x: m
It really bothers me because i've found adult magazine in their room today.   {2 A* c9 o# v( o
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. ' ~% C" N4 [0 W+ E: \
By the way, here is the photo of my sons: ) ?4 D6 ?' q- ^  K( |( T  _/ c1 x# D
Happy mother of two great sons...