A few things happen at the same time every day: your first cup of coffee, the Today show, and, probably, when you poop. And while having a daily poop time might seem like a sign that you’re amazing and regular, the scheduled time is actually pretty common. According to Kyle Staller, M.D., a gastroenterologist at Massachusetts General Hospital, your colon, which helps push poop through your body, has an internal clock of sorts. Most people’s colons are quiet during the night while you sleep (which is why you probably rarely get up to go poop during the night), but it has a wake response in the morning. In other words, once you wake up and start your day, your colon does the same.