[undies]

Here's something odd but very true.
Poor little Brigitte had some hip issues a while back and had to take paracetamol while she waited for surgery.
One of the strange things that large doses of paracetamol does is that it turns the persons urine into a dye. Any hair that is constantly exposed to urine (pubes) will go as black as midnight. Such was the case with Brig. Normally her pubes are quite ginger.

Click to animate.