I have seen a lot of stories online of people getting things stuck in there and doctors having to remove it, even items like cucumbers. I get that an item with a highly irregular shape could get stuck. But if it’s something long and rounded, why can people not just poop it out? Is it because the item isn’t soft enough?
Afaik, your intestines have an involuntary motion called peristalsis that keeps your poop moving. Sometimes, this can backfire with items that go the wrong way because they’ll get sucked up. Your sphincter also tends to stay shut and wrap around irregularly shaped items. Your intestines aren’t straight; they’re muscles that bend around items, which can trap them. Some items, like bottles and jars, are concave enough to create a vacuum that keeps them in place. You’ll have a hard time getting anything out that’s not soft like feces unless the item has a wide enough base to stop it from traveling past your anus.
Disclaimer: I’m not a doctor and some surgeon will probably tell you more details I missed or got completely wrong.