"I remember those when I went to Catholic boarding school in the 50s.."
Me, too. I have memories of our gym teacher, a Sister who joined the Order after her circus career. No kidding...
I still see her in my mind's eye running up and down the basketball court in tennis shoes, whistle in one hand, and the other hand holding the crucifix around her neck in place to keep it from bouncing.
It was so much simpler then, non?
Habit forming.