Obsessed with moms feet

A

Ok super random but not sure who I can talk to about this. My almost 3 year old has recently been obsessed with my feet and is constantly trying to lick my feet or pretend to bite my toes (actually putting his mouth on it). It's so annoying and gross! But it's ONLY my feet he's doing this with. I've tried many ways to make him stop but he still does it. Any one else? Any advice?