I think a lot has to do with what ever style is in fashion (for those who are younger) and also convenience. You guys whine about wanting your girl to have the long hair and whatnot, but don't realize the time it takes to wash/dry/style it. You jump out of the shower and gel or quickly blow dry your hair (5 minutes) and poof you're good to go. Blow drying and styling (for me this includes straightening as my hair is curly) takes about 45 minutes. It can be a royal pain in the ass.
Mike will always say "I like it when you wear your hair down and straight" (cuz I wear it pulled into a ponytail a lot or just leave it curly-so damn humid sometimes down here that even if I press it straight...it starts curling the second I'm outside, lol) but he just doesn't realize how much time goes into it but I do my best to make him happy. 

Ooooh hun I can sooooo relate!
Reminds me of the time an old friend wanted to go for lunch to this great restaurant out in Orangeville.
He was all excited too, ...cause the weather had turned and he got to take his convertible Alfa Romeo out of storage.
After spending close to an hour with the blow dryer and the hot rollers etc, you can just imagine how thrilled I was to have the top down and the wind whipping through my hair at 90 kms/ hr. for 2 hours.