哈哈，看来阿Q真是不少。这里有个link, 自己看吧。

http://www.instyle.com/fashion/shoes/dos-and-donts-trying-shoes-shopping

摘抄两段，

“Do Make Sure Your Feet Are Clean: "If your feet are smelly or unclean, put on a sock before trying on the shoe, because if you don't make the purchase, someone else will be trying the pair on," Aponte says. "We've seen everything—missing toe nails, overgrown nails, everything. Just make sure they're washed, clean, so that they don't smell; personal hygiene is a big one."

”Don't Be Afraid to Ask for Nylons: If you're skeeved out about trying on shoes without some sort of barrier, by all means, ask the sales associate for a pair of peds, or nylon socks, even if they don't offer one. "Most retail stores that sell shoes carry nylon socks," Aponte says. "Most people will forego the socks if they're trying on sandals, but it's not at all uncommon for people to ask when trying on closed-toe shoes or boots." Some stores, like Cole Haan, have policies requiring all customers to try on shoes with nylon socks for hygiene purposes, so check with the associate first before slipping on a pair.“