Well, I feel like I am always begging for it. When the stereotype is that men are the ones wanting to do it all the time, it is inconvenient, as a woman, to have such a drive. It's difficult not to think there's something wrong with you, etc.
All men say that they'd love to have a girl like that; they all claim to be ready at a moments notice... but as far as i can tell, it's not really true.