This is an interesting question. When the question of breast enhancement comes up, people are told they are being judgemental if they say they disagree with the procedure or that people should be confident with what they have. People are constantly told that if it makes YOU feel better, then you should go ahead. And yet this OP mentions a cosmetic surgery and is told that she ought to be fine with the way she is.
Now, it is highly unlikely that I'd allow anyone to take a scalpel to either my breasts or my nether regions, but that's just me. But I guess I don't see what's so significantly different about this than from any other cosmetic procedure (except other procedures are usually done on a more visible body part). The risks associated with the procedure are fairly small; it would be unlikely to affect sex except for the immediate healing period.
So while I wouldn't do it personally, if this is something that really bothers you or that you really feel uncomfortable about, I guess I don't see it as significantly different from breast or eyelid or other surgeries. The whole point of any cosmetic procedure isn't NEED; it is to make the patient feel more confident with him or herself.