My ex-wife was like that. If I ever pointed out anything I liked about any celebrity, she flipped. Then later if I ever said I liked anything about her that is any way related to what I said about a celebrity, she flipped because then I was comparing her to them. So I kept my mouth shut. Other's have suggested to stay mum about the topic. But after 11 years, it just wasn't worth it.
No more. With my new GF, I'm open and honest. I mention when I find someone attractive and why. I then ask her what male celebrities she finds attractive and why. If she can't take it, tough. I'm not keeping mum for the next 70 years of my life. Luckilly, the new GF doesn't mind.
I like many models, I find them attractive. Yes, I see the women on TV. I don't just magically go blind whenever a good looking woman comes around. I do see them. I'm not lying any more. But with all those attractive women around, I am still with my GF. My GF is beautiful to me and I'll never stray. Just because I see them doesn't mean I lust after them. Just because I find a celebrity to be pretty doesn't mean I'm going to cheat or anything. Just because I like their ____, doesn't mean I'm comparing my GF to it and it doesn't mean I don't like my GF.
It is so, so much better this way.