[经济金融] How to talk to sons

Hi I'm Gina.
5 f+ o7 y" ~' y0 p, Yrs238848.rs.hosteurope.deI'm mother of two wonderful 10 years sons. Their father has left us 8 years ago. : D  h- Z- E* O7 x. c
I have a question, maybe some of you can help me?
2 Q2 m6 `( l% ?; ?8 i6 r! c* N. f3 JAt 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?
* A" R9 I& F: x; W! k5 K! x3 cIt really bothers me because i've found adult magazine in their room today. . V' o, F& Z) G" X
Should I talk to them by miself or ask my brother to do it? , v6 r, p, W3 g+ r6 Z1 s9 k/ V; C

; O  l& G" x& {# ZHope someone had the same problem and can advise me anything.
9 _: N# y3 X. b' i" \By the way, here is the photo of my sons: ) e, ^- f2 o7 W  N' c
Happy mother of two great sons...