The cynic in me thinks that if you must wear a Rolex on that date(Good luck by the way!), assuming you know nothing/very little about her, firstly check out her footwear, if she is wearing trainers/running shoes and looks a speedy type, after the meal is finished, do NOT let her hold or try the Rolex on or you run the risk of a empty wrist, the bill to pay and a fast receding view of her arse as she speeds to the horizon!