G.P.A.C.P.
Great Pussy at Affordable Costs. You spend a lot of money on a date, and she gives you something nice in return. Usually sex. She has to be worth the price.
He spent $40 on dinner. I gave him the best sex of his life. He was happy.
I paid for the whole date. She gave me a good lay. I was satisfied.
He spent $25 on dinner. I gave him a good time. It was worth it.