system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why/How does bra padding come out a small hole in the wash?

Im sure the question seems silly, but I can't figure out the how and why padding would get pushed out a small slit in the fabric during the wash. I feel like there is something else this happens too, but I can't remember the example.
gpt
They’re designed to be removed through that hole before you stick them in a garment bag to be washed.

They come out because of the shape of the pad; it’s cupped, but also oval.  So as it gets pushed around in the wash, it moves like an inch worm out the hole, at the same time the bra straps are pulled in the other direction.