[经济金融] How to talk to sons

Hi I'm Gina. 0 {9 U  \% V: N  n; Z
I'm mother of two wonderful 10 years sons. Their father has left us 8 years ago.
, F9 N& |* p3 ]& G& p7 ]; n' r; ?7 hI have a question, maybe some of you can help me? ' e3 T, T! |2 j, `$ V+ a9 R
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? 人在德国 社区4 V) I# U4 v+ T
It really bothers me because i've found adult magazine in their room today.
9 `7 g3 o- d5 \( E3 H; p人在德国 社区Should I talk to them by miself or ask my brother to do it?
2 D( a' V1 [9 R. q+ H1 D 1 X4 c4 l/ w3 R( p8 m' J( P
Hope someone had the same problem and can advise me anything.
. @4 Z% R. k4 x9 @5 p人在德国 社区By the way, here is the photo of my sons:
2 t) a4 `( @# ^% ~% [0 E
Happy mother of two great sons...