For the longest time I was brought up listening to only two genres of music, pop and rock. So in the past few years I've been trying to expand my interests because I think that you can only write to the extent of your knowledge, and if your knowledge is limited you can't write past that.
I learned at a very early age, the easiest thing in the world is to tell the truth, and then you don't have to remember what you said. It has nothing to do with morality, just remembering what you said.