Lyric discussion by appleannie 

The "girl" is poor but doesn't realize it. She FEELS fulfilled and happy. Makes me think of a little kid whose parents have kept her sheltered. All she knows is that everything is secure and and safe, and don't know how hard the parents have to struggle to give her that sense of security. The "boy" in the song is poor, he feels empty, insecure, needing something. It's not really about their actual state of wealth, but about how they FEEL, and how they carry themselves through life based on what they feel like. The interesting thing thing to me is the teaspoon/wave reference. When I think of the shape of a teaspoon, it's concave. It can be filled, and it only takes a little something to fill it. She is easy to please, easy to fill. She can be happpy with almost nothing, and she is open to accepting what is offered. A wave, on the otherhand is a convex shape. Cannot be filled, because it's already full; there is no room for any gifts. He's not open or ready to accept what is being offered; he is too full of something else (sadness, insecurity, negativity, whatever).
And as time goes by and he continues to hang around her, her optimism and hopefulness starts to rub off on him. Now people think he is as crazy and clueless as she is. On the other hand, she starts to see reality a little more clearly.

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