Is it normal to like what my boyfriend did?

While me and my boyfriend was havin sex he turned me over in a doggy style position; I thought he was going to hit it doggy style, but instead he was licking my butt hole. It felt good all. I was wet and drippin but at a point I wanted to stop cause I was afraid that I would've shitted on him or something. That was the first time that was ever done to me so is that normal ?