Only one side of my hair straightens, help!?

Don't straighten your hair everyday, it damages it tremendously. I stopped straightening my hair two years ago during sopre year in High School. Besides, pin straight hair has been slowly going out of style. Shaggy, wavy, kind of messed up hair is in now. My hair just naturally does that, though. I go out of the house with my hair the same as it was when I rolled out of bed. I don't own a brush either (this might help for some people) because I find that it makes it frizzy. I like messed up volumous and wavy hair, but brushing it really does make it bad. I say try going the more natural way! :D