You can tell by the way they part their hair.

Also, he doesn't have to part his hair any more.

I parted my hair a certain way, to look younger.

He tried to part his blond hair on the side, but it refused.

I doubted that he could successfully part my hair with it.

He parted his hair a little more towards the centre.

At once he parted her hair and started to braid it.

Once upon a time it had seemed to Ralph she saw everything, even a change of half an inch in where he parted his hair.

One child, a boy with neatly parted hair, looks carefully around the room to make sure that nobody can see him.

He felt a whfffff as the ball nearly parted his hair.