Can a person in a relationship feel that others in the world are attractive. (Read description)

Ok, so me and my fiancé have had this argument a few times. I have said that some celebrities are good looking. That’s it. Just that they are attractive. He says I’m disrespectful for thinking other men can be attractive because I’m comparing them to him and he can’t compete. My thoughts are that one can simply think there are attractive people in the world and that’s it. I have no interest in hooking up with them.

And yes, I know there is a difference when saying this about someone in real life. That’s not what I’m talking about. I’m saying this about people on tv. That’s it.