I thing screamo's exactly right -- that's certainly what the lyrics made me think of. The chorus establishes that he has this crush on her. Then we hit the verses, and you get, "and from what I hear, you're quite affordable": he knows that she's not only a whore, but a cheap whore. He tries to pretend she's actually his girlfriend by finding excuses to spend a lot of money on her when he hires her. He even tries to write her love letters (verse 2) and he takes her out to a club and dances with her (bridge, "I turn on a dime, spin me around... we'll even have a crowd"), but despite all this, he "can't get through", and she still just thinks of him as a client. Really, she's just racking up all of this money he's spending on her and she doesn't even have to pretend she's really interested in him, because he's so completely taken with her.
I thing screamo's exactly right -- that's certainly what the lyrics made me think of. The chorus establishes that he has this crush on her. Then we hit the verses, and you get, "and from what I hear, you're quite affordable": he knows that she's not only a whore, but a cheap whore. He tries to pretend she's actually his girlfriend by finding excuses to spend a lot of money on her when he hires her. He even tries to write her love letters (verse 2) and he takes her out to a club and dances with her (bridge, "I turn on a dime, spin me around... we'll even have a crowd"), but despite all this, he "can't get through", and she still just thinks of him as a client. Really, she's just racking up all of this money he's spending on her and she doesn't even have to pretend she's really interested in him, because he's so completely taken with her.