I don't, cause it seems kind of gross, but I have three cats, and especially the littlest one, I want to gently bite her ears and feet--not so it hurts her! They gently bite me, out of playfulness and affection, but this is an urge, not something I logically came up with. I also like to examine my cat's paws, gently press the pads to see how the claws come out, my cats don't mind this. I also like to put my face on their soft bellies. Is this normal?