Different kinds of prey have different textures, and the textures that cats prefer eating are the ones similar to the food they learned to eat as kittens.
If your cat doesn’t get enough playtime, it might lick your wall repeatedly because it needs something to do. Boredom in cats can cause all sorts of repetitive behaviors.
Ingesting enough ethylene-glycol through licking is rare, but cats who consume enough to be poisoned can become sluggish, clumsy, urinate less, and change their habits.