Sorry to disappoint girls but a Gynaecologist will IN NO WAY, condone any of these practices, they are unecessary and from a medical point of view represent pure risk with zero medical gain. They will want no part in this procedure and will advise against it.
I have to echo some of the sound advice given to Nikka in her branding post, that while the idea is ( for me anyway ) profoundly erotic and a massive turn on, the reality is considerably more impractical, irreversible ( if you don't like it ), and potentially dangerous ( it's a surgically dirty area down there and wound infections will hurt a lot !). I also agree with Mobius' speculation that over time it will desensitise and toughen your clit.
Maybe you could explore other things to do to yourself, there are a wealth or piercing options and jewellery that rubs against the clit or exposes it.