nycgirl /soKlu/Miss24 as funny as it may seem to you, a lot of those generalizations exist because there is a lot of truth to them. They don't simply come from nothing.
I agree with golden totally in that both sexes can be sly, but men will often take it worse. However those generalizations about women (e.g. a woman will try to change her man and then get fed up of him) hold a lot of truth.