Is the jokes topic closed tonight? - I fail to see what half of these responses (yes, including mine) have to do with the question which is in the 'Travel' topic.
as others have said, nothing unduly revealing, save the shorts/swimsuits for the beach. It being Ramadan doesn't make any difference, though it's impolite to eat and drink in front of others who can't during the day. Dubai's fairly liberal and well used to tourists; but it's theroetically possibly to get into trouble if you share a room while not married, or if you take in painkillers that include codeine.