It is usually so only on the surface. In reality, they know how to secretely lead their man with subtlety and patience. For me, this is really what femininity is about. I feel feminine because I have this feeling of my responsability in my relationship. I'm the one who thinks about everything and plans it patiently, without reservation.
Femininity is hard to define.
There are the devices to give you the illusion of femininity but, for me, it's more like an inner frame of mind, a way of being. I'd say that it's something emitted that can't be touched. It has to do with accepting yourself as you are, with inner peace. I think that you learn how to be feminine, that it comes with self-knowledge and, perhaps, with maturity. I also think that a being with a loving man who draws out your true self-image helps you to become feminine.