Reading habits

I was away with work for most of last week, and realised that when I'm at a conference or something, I HAVE to read crime fiction. It's a weird compulsion, and I don't really understand it. I quite like reading whodunnits, but in general I've got several books on the go, and swap between genres according to my mood (I'm currently reading The Girl Who Kicked the Hornet's Nest, Scoop, Harry Potter e la camera dei segreti, The Greatest Show on Earth and The Little Book with a few dabblings in Italian history and culture on the side for when I'm feeling virtuous). What is it about being away with colleagues and tackling the constant threat of having to be nice to clients that makes me want to read about solving murders? Hmm.