If I were you, I wouldnt do it simply because your DH is so against it.
I think your hubby has as much right as you to an opinion where cosmetic issues are concerned, and if he is strongly against it, you should probably respect that.
When all is said and done, as minor as it is, it is still a "medical"procedure, one which does carry some very minor risk of infection.
I would be upset if my DH went and gave my DS a radical haircut, sure the hair will grow back, but at the end of the day, I have to look at him.
I think decsions like this need to be made together, as once done, cannot be undone (yeah, I know you can take the earings out, but the fact that you ignored your DH cant be undone KWIM?)
GL