[janette]

That's called evolution! Better equipped - survival, and providing the gens to the next generation.

[Cronos]

I DO know that. However, Red brought up a good point -- evolution can be either because of necessity or because the mate likes it (which since it means the guy gets to .... Is a necessity too!). For example peacocks' tails are due to this beauty in the eye of the peahen beholder.