Spot on post io856! The gorgeous ones are usually the most insecure and they need their huge@ss egos to be constantly fed.
That depends on the actual person. MY sister is 19, looks super hot (178, blond, cute face, slim, huge boobs - typical playboy girl material) and she is clever too. And she is almost uninterested in men. She is just happy learning, having fun with her gfs, etc., doesn't need any validation from men. So what you wrote is just too strong generalisation.