Tales from the traffic lights

JUST WHEN I THOUGHT I HAD SEEN IT ALL!

I look in my rear view mirror at the traffic light and observe the woman in the passenger seat of the car behind me, holding a mirror while carefully plucking the hairs from her chin, with a pair of tweezers.

"No," I think, "I am seeing things." I look away and then take another look. But it is happening. All the while she is chatting to the driver.

Just as the traffic light turns green, she completes her task. She studies her tweezers and deftly wipes them off on her ample bosom.

Is this common practice or should this be done in the privacy of one's home?