The red lipstick? It's supposed to signal fertility and readiness to mate. Just like the swollen red butt of a baboon. That tight-fitting little dress that shows off your curves? From the standpoint of evolutionary biology, big breasts represent a healthy mate who can feed a lot of offspring. That's why men are programmed to like big tits. When you show off your curves, what you're really doing is advertising to the whole world: "Look at me! I'm a healthy female! I'd be a perfect mate! Come mount me!