Bra test

While looking for info on the uses of Jacob wool, I came across a reference to the "bra test" -- which is apparently when one knits a swatch out of the yarn to be tested, and puts it in one's bra for a day to see how one's skin reacts. (For those of us with small breasts, this could also be called the "stuff your bra" test. ;) Or maybe the swatch in question is meant to be quite teensy?) Anyway, I like the idea. I'll have to try it someday. ;D