Its one of those topics like "should you dummy"... I'm of the belief that you should do what you want.

My obgyn doesn't do them but knows he has to refer you to someone else. I can't remember why I know that as I have a girl.

Before we knew it was a girl I was lucky and just said "Dad this is your decision". I read a lot of chat channels that basically go with whatever the Dad is the baby is so that way they don't look different.

Stick to your guns, and its not like you can reverse it its really no one's business but yours. He will be fine and its not like he'll know the difference. I had mate get his done at 22 - apparently very painful then... if your going to do it, do it young.