Honest question: what if your partner's feet are not your type?

Something I feel bad even typing out. I have been with my partner for four years and I am very happy. This is not a complaint about her.

But if I am honest, her feet are not what I would have described as my preference before I met her. Not remotely a problem, not something I think about often. It is just true, and every time it crosses my mind I feel like a horrible person.

Does this happen to other people? Does the preference change over time, or do you just stop thinking in those terms?