Sentence:  a male undergoing a garden-variety mid-life crisis is disturbed not by his sexual appetites but by the lack of variety in his sexual partners. He is disturbed not by the crass materialism of his life but by the fact that he is still driving a Ford when he could and should be driving a <WSD>Porsche</WSD>. 
Meaning of the word marked with <WSD> tags:  A car of this brand, reputably high performance and expensive.