I have naturally poker straight shiny hair, and it takes me 1.5 hrs to wave it using a conical wand. Even then it's more like the odd kink here and there after a few hours, don't think sexy bedroom hair; think odd straight bits mixed with irregular waves.  I could never get if fluffy, or matte! Oh and to top it all I look ridiculous with a centre parting, it just makes my face look fat. Guess I'll be very off trend this summer...!  The one saving grace could be my bangs... :)