Fool?

Whenever a guy goes out on a date with a girl, who should be paying for the expenses? If both parties were to pay for their own individual expenses, it would seem a little stingy on the part of the male. However, if the guy were to pay everytime, then he might be seen as a fool and also treating as a "money shaking tree". Why do I always have the time to ponder over such questions in which there are no definite answers?