he has an email address which he has obviously given out in school to his mates.
One of the girls has emailed him with rather a forward email, which he was a bit embarrassed about, I have told him to be polite about it and just pay no attantion to it but I think if I was this girls mother I would want to know she was sending such emails.
I have checked with DS and she doesnt have any older brothers or sisters who could have sent it as a joke. I would be shocked if DD is sending stuff like this out at 9/10
maybe Im just a bit stuffy, but I dont think so.