Loss of sensitivity? Really? I've always thought mine was overly sensitive As far as I remember I think I was circumcised due to Phimosis which from what I've read my parents did me a favour letting the doctors treat it as early as they did.
They did. I've got phimosis and I'm having to get cut in a month or two, and I am not looking forward to it one bit.
Also it reportedly feels different for the chick because if you're uncut there is more penis to stuff up her hoo-ha.