Hair Talk

I have highlighted shoulder lenght hair. I've always had a little wave in the back underneath all my thick hair, near the base of my skull. Just recently, I've noticed this wave coming out all over, although I prefer to have straight hair, and always have, but I like the look of the wave as well, less blowdrying to damage my hair. I can just let it go.My problem is 1) why after all these years (i'm 26) is this happening how, going from bone straight hair to wavy hair?2) I have so much thick hair, although it's layered, and I may get used to the waves I have, how can I keep them in shape, since when they dry, its' all frizz and too much body??Your reply would be much appreciated.Tanya