Males of all species are made for wooing females, and females typically choose among their suitors. If you take a closer look, you can observe such behavior all around you. The beautiful bird chirping outside your window. It’s a mating call. That pretty little bird is trying to attract a potential mate, so that it can propagate its genes. Why does the peacock have such beautiful feathers? It is to attract a healthy female. He as well is trying to propagate his genes. Even we humans, are not much different from the rest of the animal kingdom when it comes to attracting potential mates. When women dress up for their night out at the club, they are doing so to look attractive. This is a subconscious evolutionary desire to attract as many potential mates as possible.... While women tend to grab attention with their looks, men on the other hand, tend to attract as many potential females as possible, by showing off their resources. When a man shows off with his fancy car, expensive gold watch and suit, or flexes his muscles and brags about how many credit cards he owns, he’s doing so to make himself desirable by healthy women, in order to propagate his genes. It is all in the pursuit of reproduction.

~ Abhijit Naskar

[O]ur percept is an elaborate computer model in the brain, constructed on the basis of information coming from [the environment], but transformed in the head into a form in which that information can be used. Wavelength differences in the light out there become coded as 'colour' differences in the computer model in the head. Shape and other attributes are encoded in the same kind of way, encoded into a form that is convenient to handle. The sensation of seeing is, for us, very different from the sensation of hearing, but this cannot be directly due to the physical differences between light and sound. Both light and sound are, after all, translated by the respective sense organs into the same kind of nerve impulses. It is impossible to tell, from the physical attributes of a nerve impulse, whether it is conveying information about light, about sound or about smell. The reason the sensation of seeing is so different from the sensation of hearing and the sensation of smelling is that the brain finds it convenient to use different kinds of internal model of the visual world, the world of sound and the world of smell. It is because we internally use our visual information and our sound information in different ways and for different purposes that the sensations of seeing and hearing are so different. It is not directly because of the physical differences between light and sound.

~ Richard Dawkins