On a road trip out to a poetry show, Madonna's "Justify My Love" came on, and I turned to Bobby and said "Did you know this song was written by Lenny Kravitz?"

"You seem to know an awful lot about Lenny Kravitz." he said.

And, yes, at least five times in the previous week I'd pointed out some piece of Lenny Kravitz-related trivia. But, why? I mean, I like Lenny Kravitz just fine, but he's not My Favorite Artist. Why do I know so much about him? Did I fall asleep during his episode of VH1's Behind the Music?

Possibly.

Write about a subject of which you have a disproportionate knowledge to passion ratio. Maybe you hate baseball but your parents were really into discussing the stats of the 1984 Milwaukee Brewers. Or, perhaps, you were locked out of your house for six hours with nothing to read except a True Value Hardware circular and now you can name the price of every item that was on sale on January 11th, 2002.

Tell us about your dispassionate knowledge.