I'm going with the mayo. Sounds like one of those homemade spa ideas I'd have read about in Glamour magazine when I was in high school. I still remember slathering my feet in lotion, wrapping them in cellophane, trying to put socks on, and then slipping and slithering around the house. Pretty funny considering how I have the ugliest feet on the planet. I am the Quasimodo of the foot world!