2. When you get the socks, feel free to wash them...but not if you have one of those washers that eats socks. That would suck. You are not obligated to wash them before sending them to the next person.
From THE RULES of the Sisterhood of the Traveling Socks Flickr Group.
Twenty-two pairs of feet so far. Wanna see some more? (Slideshow contains judicious nudity, and some outright goofiness, just like you like it.)