Reminds me of a very funny Czech film called The Unbuttoners, about a couple who pinch buttons from sofas with their butts. Among a bunch of other weird shit.
Either that or the human digestive system isn't strong enough to break it down. A lot of roughage, and she's lucky she hasn't given herself an obstruction of some kind, but aside from whatever chemicals and pesticides the furniture company may have treated it with, that's probably about it.
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