system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How and why are bowels able to create such audible sounds?

(Edit): I have irritable bowel syndrome, and my bowels can get so loud that even other people can hear them, and they also create huge vibrations that i can see happening under my skin. What kind of process is this?
gpt
Take a ketchup packet, fold it, and squish it back and forth from side to side.  Hear that?  It's pretty much the same- the sounds come from gas and liquids getting squished through your intestines by peristalsis.