uncircumcised

So I just got with this guy recently and we hit it off, the past few days we had sex. But the first time I went down on him I noticed he was uncircumcised, which doesn't gross me out, make me feel weird or anything (I actually like the way it just feels natural) but I don't know really what to do during oral, he said I was good but idk...have any of you guys been with a guy who was uncut, any tips or tricks?