Could you point me to a comprehensive source on that, please? It's not my forte.
Ha! Well, aside from personal observation, and noting the many License Plate frames that say "Happiness is being a Grandmother", I have never seen a license holder that says "Happiness is being a dried up old prune of a feminist who doesn't have any Grandchildren" I think you would agree that's far more valid than most of the "research" brought to FR? -ggg-