Bath or Shower

Just another peculiar thing about Jake. For a few years now he has been taking either baths or showers, we let him choose each night. However, they always go in cycles of about eight to ten weeks. He will only get baths or only get showers for this period of time. He is incapable of switching back and forth. He is used to doing both and likes both, but he doesn't like change at all. He is a creature of habit, but every few months for some reason he will just switch. He is a peculiar boy.