It means that once you've spent a certain amount of money on her, spending more money won't mean that you will get lucky more often.
Oops, I got off track.
It means that the marginal utility of the extra musical satisfaction is less than the marginal utility of other uses for your money.
Oops, I got off track.
It means that the marginal utility of the extra musical satisfaction is less than the marginal utility of other uses for your money.