You have to purchase the socks, which you then are expected to bring any time you come back. If you dont have their socks with you, then you have to buy new ones each time.
You get to keep them and you can bring them back so you dont have to keep buying more
You purchase them. So yes they are yours from time of purchase.
Yeah you can keep them
You need to purchase them the first time you go there and then reuse when you visit any time later.
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