Why are guys expected to pay?

If where expected to pay what is expected of girls?
If a date goes badly i'm assuming you should make sure she pays because if where paying all the time we must be paying for something.
Guys always being expected to pay seems like a recipe for guys geting used for free fancy meals or a free trip to a snow dome or lazer tag in my case because i want some thing more interesting and active than restaurants.
Money doesn't grow on trees. It takes hard work to earn it.
Why are guys expected to pay?
Add Opinion