Talk:Kejourou/@comment-24931528-20140816181022/@comment-3199121-20140818025819

According to the entry on the text, her hair feels like the finest silk to the touch, and more than just hair, it's imbued with her mana that not only would serves as absorbing a man's jizz and sweat (like, fully embrace him wiht her hair during copulation), should she finds one of her fancy she'd give that man a lock of her hair, the mana imbued within will drive a man mad for her.

So, barring more details to be available later, we can assume a Kejourou's hair is either self-cleaning, or well-maintain as an asset of her charm.