This has come off the back of a thread, not a TAAT though.
It seems a lot of people on MN have children who have birthday parties and only invite children from school of the same gender.
My DS has always had mixed parties; when he complies his guest lists he seems to have a fairly even number of boys and girls, and he gets invited to leads of girls parties(he is 9).
There doesn't seem to be this gender divide that I keep seeing on MN.
So I wonder. Is this a parental influence? A school influence? Or just the luck of the class group you are in?