When another cat’s urine has been detected by smell, the cat will then lick up the urine, then move the tip of the tongue against the upper palate. Yes, it does sound disgusting, but the reason he does this is that above the hard palate is the vomeronasal organ, a sense organ that (probably) can tell the cat the sex of the cat who produced the urine. Some scientists consider this organ to be the source of a cat’s sixth sense.
