I had an orange kitty, recently passed, who was very clever. He would chase my wife's feet after it was time for her to get up, and would see me off to work just about every morning for a year before he started getting sick. He would always want to be between us if there was a between to be had.

His idiot/asshole black litter mate, would forget who he was if either went to the vet and hiss at and attack him for a few days afterwards. He also knew those were feet his brother was chasing, he just didn't understand why.