I also have that kink. Every week end,on friday night when she watching business news channel or reading a magazine, I clean her foot, with warm water and cold water, remove the nail polish and before I paint them again, It is my pleasure to suck each one of her toes, but I concentrate on the big toe sucking them and licking them when inside my mouth. I get grate satisfaction when I am doing that. I go on doing that alternatively on each foot , until she says 'ENOUGH' . Only then I will stop and wife iher foot clean and apply the nail polish, which of course is chosen for her