system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why do certain foods pass through you so quickly (I.e the diner, Taco Bell, etc). I went to the diner last night, and came home and was on the toilet all night(TMI). Isn't the food not even digested by that point?
gpt
Among your bodies numerous reflexes is something called the gastrocolic reflex. Like you're five: your body does some things automatically. One of those automatic things is that when you eat food, your belly sends a phone call to your brain to tell it if there's still food in there from the last time you ate (which there usually is). If there's plenty of food in it, your brain decides "Well, better make room for more food" so it tells your belly and your butt that it should probably poop soon. You wouldn't want your belly to get too crowded, because that would feel awful. Some foods make your belly feel awful no matter what, just because of what is in it. Everybody's bellies are different, but some of them are not friends with greasy food, and some of them are not friends with spicy food, and other bellies are not friends with things like milk or grain. so if you eat one of these foods, your belly has to spend extra effort dealing with it. And one of the ways your brain can help your belly out is by clearing out the other food that is in your belly already. So it makes you poop. You actually aren't pooping out the food you just ate. You are pooping food that you ate earlier, even as far back as yesterday, that you just haven't pooped yet. Cool, huh?