It's not about being thin, it's about being healthy. And when you are a child you like to eat all these unhealthy things like chocolate and sweets. Oh my God. I love strawberries dipped in chocolate and Lion bars and Toffee Crisps - and as you grow up, you have to learn that those things are only good in moderation or you will become very fat.
The only thing that matters to me about my stories is that they're entertaining and they're funny. And I tend to get bored easily, so I generally throw something supernatural in. I would say they're humorous novels that have a supernatural bent, but that's as close as you're going to get to fitting them all in the same basket.