My DS1 asked when he was about 12 and I took him to get it done (one ear) he lost interest about a year later and it closed over...about 4 months ago he did it himself at school...I was worried about infection (silly boy) but I looked after it and it healed fine and I really don't mind it.
My DS3 is 8 and really wants his done and has been asking for about 6 mths
I really don't see the difference between getting a girl done or a boy....especially if they ask for it.
I think it is a little unfair to allow one and not the other...but that is just me.