Thank you for the tip catspaw49, I will look for that book.

I agree with Desdemona that it should be on a case by case basis, but it often isn't that simple. My Mudcatter friend assures me that if I put on a long wig over my gray hairs, and wear a push-up bra and tight jeans, and then sing songs about cats and bellybutton lint then I will have a shot, but until then I am going to have a fight on my hands. That is okay by me!