I think it's incredible that the body can learn and adapt to your own routines like that. I do a daytime fast every year for three weeks, so i don't eat food or drink while the sun is up. Within just a couple days my body catches on and I end up needing to pee an hour before sunset everyday like clockwork. Like my body is like, "it's 5 O'Clock, the idiot is going to start drinking again, we can release the reserves." It's just wild.