That said, you and your lover should talk about what exactly he likes and wants. Many foot fans are into footwear, for example, and love seeing a woman walk around in stiletto heels and black seamed stockings. Body odors in general are a category of sexual turn-ons. Maybe you're familiar with the Saturday Night Live character who likes to stick her fingers under her armpits and then sniff at them. I hear you saying.
Some guys like to see their partners DO things with their feet.
From popping a balloon between your soles to using your tootsies like hands on a certain part of his anatomy, these are all activities a foot enthusiast might enjoy. You indicated that your boyfriend wanted to lick and kiss your feet. This might seem less weird to you than the full-blown foot worship he first suggested. Be forewarned, though. If licking and kissing are really what he desires, he'll want to work up to that eventually.