What's the out of character topic you've written about?

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Clarification: What I mean is not did you write about blood sucking zombies (I'm sure that's somebody's main gig). What I mean is what's the most out of character thing you've ever written. In my case, people would think it was odd that I wrote a very conservative view of pretty much anything. How about you? What was the most out of character thing you ever wrote and why did you write it?