Found this over at I-village bro. Chocolate is suposed to increase the production of Nitric Oxide, which helps blood flow. Arginine is a pre curser to NO, so that may help. Excercise is also supposed increase blood flow, but I think you got that covered.
Do:
• Serve food that is delicious, different and perhaps a bit rare.
• Dish up foods reputed to be aphrodisiacs, such as artichokes, oysters, strawberries and chocolate.
Don't:
• Eat overly fatty foods, especially on the big night. Fat takes a long time to digest, all the while diverting blood flow to the digestive system and away from the reproductive system.
• Drink too much alcohol. A little can loosen inhibitions, but too much can become a sedative.