Or sometimes straight.

My hair just can't stay straight. When my hair is wet or sweaty, it becomes a little curly

Same as Lisa.

i don't know...that my hair is straight or wavy...because most of the times it is straight...but sometime it becomes wavy

My hair is curly (like Weird Al's hair, only his looks better). It doesn't get really straight, but I try to straighten it. I just have it in a ponytail so it doesn't make a difference.

I just brush it.

I LOVE WAVY

my hair is real curly:)

On special occasions I straighten it. Naturally, my hair is mostly straight but very slightly wavy too. I kind of like how it looks on its own, it just doesn't look very formal somehow and I just like to straighten it when I need to look a bit smarter.

My hair is naturally straight. I do some hairstyles sometimes as well.

My hair is thick and curly, so I put it in a braid.

It's naturally curly.

I have short hair and I simply leave it the way it is (whis is mostly straight with some waves when it's getting longer).

My hair is natually wavy. It was more straight when I was younger but as I got older it got more wavy.

It's usually in a ponytail or a bun, so it's wavy right after I take it down... buuut it doesn't take long to straighten itself out. Whether I want it to or not.

The brush makes it wavish.