In 7th Grade I had a pretty attractive teacher in her early 20's, who looked like Cameron Diaz. She'd always wear mules, and when sitting at her desk, she'd always kick off her shoes and sit barefoot. I'd always see her empty mules on the floor.
One day, while she was giving a lecture, she was sitting on a chair. She was wearing particularly tight jeans that day (and, feet with jeans are so awesome). She took off one of her mules and began to pick callouses off the ball area of her foot. A girl asked her, "Ms. S., what are you doing?" The teacher then said, "I'm picking my feet". At that moment I got so hard!
She then asked if anyone wanted to smell her shoes. "They stink so bad!" she laughed. Me and a few other kids raised our hands. When she came towards me, I got so excited. A beautiful blonde walking towards me barefoot in jeans, with her stinky shoe in her hand. She put it in my face and I took a long whiff of it. It smelt like rotten cheese and vinegar!
She then put her shoes back on and went back to teaching. I never looked at her the same way again! This really jump started my foot fetish, because I thought "How can a beautiful woman have smelly feet like that?" I always stared at her feet after that occasion!