One word: Absolutely.
This goes back to.. Jr High School for me, lol, and yes its okay if this is mentioned, because it was a teacher.
I distinctly remember that a very cute woman who was my Jr High school history teacher, used to teach class barefoot at times, because she had a pair of shoes that hurt her feet. In fact, one time she was sitting on a desk near me, barefoot, and caught me glancing at her feet. She mouthed to me, so no one else could hear. "My feet hurt from those shoes"
Same thing in college: I had a female academic advisor, a pretty older woman, who would always wear sandals at the beginning and end of the year, showing her beautifully red polished toenails lol.
As for students in college whose feet distracted me, I'm sure it did happen, but I cant recall any specific incidents like the two with the teachers/advisors.