I read an article once about a Japanese hotel, where they had a sign that said not to walk the corridors in your underwear. At first the tourists wondered who'd ever do such a thing, but once they began wearing the yukata (I assume, though it was referred to as a kimono I think), they realised how easy it was to forget oneself and walk around wearing only that. I view it much like a bathrobe. Or <i>exactly</i> like a bathrobe.