You mean, official talk with adults or just finding out? Because I don't remember either, but I know the latter was quite a bit earlier than the former.
when I was three, actually, because I asked what a vagina was, actually told my preschool class what a vagina was. pretty funny actually.Professor James said:What age did you learn about sex? I learned the idea about it when I was 11, better detail when I was 13.