its just a human nature i guess. Everyone one wants to look beautiful and handsome. Its just like that beautiful and handsome are worshipped and demand more in this society. And opposite sex will sure love you when u r handsome and beautiful.. this is just like that i don't have much reason. But yea for me ..i do it for myself, to make me feel better and fell other better too. Even animals try different things to attract their partners then why not we ?