Realizing you may like anal..

A couple weeks ago my boyfriend and I were doing 69 and I was "sitting" on his face and he put a finger in my butt in the heat of the moment and it was enjoyable combined with amazing pussy eating he gave me.. I feel weird about now I anticipate and he hasn't done it since and I don't want to ask for it because I kinda feel ashamed idk why though...anyone else feel like this when the experimented with anal?