How you phrase it

I was having a conversation with a friend recently and we were discussing languages (and my apparent disability when it comes to learning them). I mentioned that among the other truly not useful things stored in my brain is the phrase "I don't know how to speak Russian", which actually did come in handy one day at a pharmacy, much to the confusion of the Russian lady I replied to. He thought that was a very useful phrase, and added these to the list of ones you should know when first learning a language: "Where is the bathroom?", "What's for dinner?", "Will you marry me?", "Are we married?", and "Take me to your leader". I was reading Molly Watson's excellent cooking blog, when I came across this post. In it she talks about a very strange phrase book she and a companion picked up which included phrases such as, "your hair is like gold, but more precious", and "you dance like a fairy". I have decided that learning how to tell someone that they dance like a fairy is too good to pass up. My daughter would appreciate hearing it, and perhaps because I am a girl I will avoid being seriously injured by a man in a discotheque. So, we'll start with Swedish I think:
Du dansar som en älva.