I'm cut and I'm absolutely fine. Do I have reduced sexual sensitivity? How the hell am I supposed to know?
Basically, there are some possible medical benefits (I suspect this is the reason I was circumsized) and some religious traditions, and if either of those are enough, fine. Like PLM said, you're only a few days old when they do it. You're not going to remember it. But also, like El Barto said, give the parents accurate information, then let them decide. Circumcision because "why not" isn't a very good reason, though.