Religious Sacrifices

I realize this topic could go the wrong way, but finding the answer is important to me.  Why does the God of the Dryer demand a sock sacrifice, and does the God of the Clothes Line demand a similar sacrifice?

i always assumed it was a dimensional problem-- in some other dimension or the upside down or whatever you want to call it, someone needed a sock. it went there. then next week i find it hanging in my orange tree, after they don't need it any more.
now i'm wondering if the Clothesline Deity only needs it temporarily.

Pratchett fans will know  of The Eater of Socks