Quote:
Originally Posted by Freeshadow
They're abducted by the puppet master of sock puppets. 
Sorry couldn't resist.
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On the contrary:
Hogfather (Terry Pratchett), page 201
Quote:
“This sock creature…does it just steal them, or does it eat them?” said the Senior Wrangler.
“Valuable contribution, that man,” said Ridcully, giving up on the Dean. “Right, pass the word along: no one is to look like a sock, understand?”
“How can you—” the Dean began, and stopped.
They all heard it.
…grnf, grnf, grnf…
It was a busy sound, the sound of something with a serious appetite to satisfy.
“The Eater of Socks,” moaned the Senior Wrangler, with his eyes shut.
(stuff happens)
The Eater of Socks looked up at the wizards, cautiously. Then its jaws started to work again.
…grnf, grnf…
“Here, that’s one of mine!” said the Chair of Indefinite Studies, making a grab. The Eater of Socks backed away hurriedly.
It looked like a very small elephant with a very wide, flared trunk, up which one of the Chair’s socks was disappearing.
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(This would be when the absence of the titular Hogfather (not EXACTLY Father Christmas) -- due to character assassination -- led to an overabundance of unused belief; when people started wondering where those socks go, their belief coalesced into the responsible entity.)