My wife has said many times she prefers a guy that's circumcised, but when our boy was born 13 years ago we decided not to have him circumcised. We felt it should be his choice choice if/when he wanted to do that. When he was around 6, once, he and I were showering and he mentioned he noticed the difference, and I just told him I was circumcised and he wasn't, and if he ever wanted to be, he could. He's never mentioned it since. I don't think most guys really care one way or the other, though.