You date a girl and find out later she smells just like a percolator

The answer is "498days".

The question is "How long did it take Jen to spill coffee on her desk?"
(For those not in the know, this was quite an impressive streak for me. Also amazing? This time it miraculously managed to miss both the keyboard and the mouse; over the years, no less than 5 keyboards have met with their untimely demise due to my lackadaisical drinking habits!)