I've had both uncircumcised and circumcised penises and performed oral sex on both. There is a slight difference in taste, not necessarily bad, but it's definately noticeable. Uncut penises turn me on, but then again...So do cut ones lol...I can say no preference I guess.

BTW--If I EVER have a baby (which I hope I DON'T), and it's boy, he will NOT be circumcised at birth. It is not my place as his mother to decide if he wants his foreskin or not, that is something I feel very passionate about, now. If he wants it done at a later age, then fine.