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?
The reasons for insertion in decreasing order of frequency are autoeroticism, concealment, attention-seeking behavior, “accidental,” assault, and to alleviate constipation.