Correct me if I am wrong, but I believe that bra sizing is done by measuring across your chest at about your sternum, giving you the size, then by measuring at the nipples and subtracting the first measurement then a diference of 1 = A cup, 2 = B cup... etc.
My next Q is about shaving. I have never done it, but am thinking about shaving my crotch & crack. Any advice? pitfalls to be wary of?