Do you drink beer?

Man Logic This is a conversation between a man and his girlfriend. Please note that she asks 5 or 6 questions which I answered quite simply and she is speechless after answering only one question. Woman:    Do you drink beer? Man: Yes Woman:    How many beers a day? Man:    Usually about 3 Woman:    How much do you pay per beer? Man: $5.00 which includes a tip (This is where it gets scary !) Woman:    And how long have you been drinking? Man:    About 20 years, I suppose Woman:    So a beer costs $5.00 and you have 3 beers a day which puts your spending each month at $450.00.  In one year, it would be approximately $5400.00 correct? Man:    Correct Woman:    If in 1 year you spend $5400.00, not accounting for inflation, the past 20 years puts your spending at $108,000.00 correct? Man:    Correct Woman:    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? Man:    Do you drink beer? Woman:    No. Man:    Where's your Ferrari? T.Mann