Traditionally, the corsage is worn on the left side of the dress or on the left wrist. However, this rule is not set in stone, and it is best to ask your date which wrist she would like to wear the corsage on. Most people are right-handed, so the corsage is usually worn on the left wrist. If your date is left-handed, she may prefer to wear the corsage on her right wrist. Ultimately, it is up to your dates preference and the style of dress she is wearing.