[经济金融] How to talk to sons

Hi I'm Gina. / b+ F" `  j! u6 T" q
I'm mother of two wonderful 10 years sons. Their father has left us 8 years ago. 4 G4 F- b. [" a: T4 C8 Z$ \5 i' `
I have a question, maybe some of you can help me?
' [$ Y5 B+ k, k$ Y5.35.249.64At 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?
. c' R# O- x/ _It really bothers me because i've found adult magazine in their room today. ( R6 {! s5 u6 `. l, T; _
Should I talk to them by miself or ask my brother to do it?
6 r% R+ ^0 {/ |8 h) ]6 M+ f 5.35.249.642 _( Z/ r" h, W  x
Hope someone had the same problem and can advise me anything. 7 |7 w0 `1 ?8 m  K( _( b1 u; N
By the way, here is the photo of my sons: 人在德国 社区. f# @% d& }, r7 |" r. R8 ]& j
Happy mother of two great sons...