Buying a prom dress can be a fun event but sometimes a girl can get nervous about wearing a dress that doesn't have any sleeves or even any straps to hold it up. Something that many girls don't realize, however, is that a lot of today's prom dresses are created in such a way that they practically hold themselves up and a girl won't need to be worried about yanking on the dress all night to make sure it's hanging as it should. It's important to make sure the dress isn't too tight because even if it's the right size it should stay up just fine.