Evolution and Beauty - Is attraction to Beauty Bad?

In many a religious thoughts attraction to beauty is a sin. We also avoid it. More or less it is perhaps for helping control the carnal desires and their fallout on the society. When there as not law and order, strong enough, to curb the sexual crimes, these thoughts have helped preserve the fabric of the society.
But we and the very same institutions of our society also marvel at the beauty of the world around us. Those numerous species of animals and plants and their beauty. But why the attraction to the beauty of opposite sex, have been a tabu in medieval eras and is even now? For it is attraction to the beauty of the opposite sex, that has created such a beautiful variety of the animals around us. And the attraction of the pollinators to ceratin colours and forms has given us so beautiful flowers. Same logic can be extended to fruits as well. Let me elaborate:
Have you ever wondered - Why do we have two eyes and not four - say two at back - won't that have been better? or even better placements of the two existing eyes - one in front and one at the back. Or why is human form so beautiful that some religious scriptures go on to call it "the form of God"? Is there an evolutionary answer?
The survival of the fittest has sure been a key to the Evolution of Species and so have been other factors, like geological changes etc. But one of the other key factors, I believe, has been the inherent attraction to beauty.
Haven't you seen, atleast the picture of, a male bird dispalying its beautiful feathers and patterns to attract a female in the mating season. We sure have marvelled at the beautiful display of the feather patterns of the peacock. Can you imagine if the females of these bird sepcies have not been attracted to the beauty of these male birds. Would there have been a way where these beautiful patterns would have improved or we would have developed so wonderful aptterns. Many a times, many traits which would have been better for survival had not had a chance against more beautiful ones. Had it not been there, who knows, what the shape of the things would have been - we might have had a world of animals - much more efficient but not so beautiful.
Simialrly imagine the beautiful flowers that the plants produced to attract the pollinators. The beautiful scents and the tastes flowers and fruits had to develop to attract the animals who would disperse their seeds far and wide and ensure their suvival.
Something which has given us this wonderful world with all its hues and colours - is beautiful.
So the next time you are attracted towards a thing of beauty you may think - nah! its not bad! and I know where it comes from. And deal it with it knowing your weakness for it rather than denying it altogether! And also marvel what a simple inherent quality or rule, can lead to in the long run! Now that one quality might have been given to the living beings by God or might have been the result of something other. But just think........isn't it beautiful.