Parallel thinking

[Top Cat]

So after a bit of silence the wife says…..

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Do you drink beer?
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I said: Yes
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Wife:: How many beers a day? 
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Me: Usually about 2 or 3
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Wife:: How much do you pay per beer?
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Me: around £4.00 (This is where it gets scary !)
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Wife: And how long have you been drinking?
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Me: About 20 years, I suppose
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Wife:: So a beer costs £4.00 and you have 3 beers a day which puts your spending each month at £360. In one year, it would be approximately £4,300 correct?
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Me: Correct
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Wife:: If in 1 year you spend £4,300, not accounting for inflation, the past 20 years puts your spending at £86,000 correct? 
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Me: Correct
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Wife:: Do you know that if you didn't drink so much beer, that money could have been put in a step-up interest savings account and after accounting for compound interest for the past 20 years, you could have now bought a Ferrari?
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I said: Do you drink beer?
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Wife says:: No.
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Me: Where's your Ferrari?