Not only humans but animals too, since their origin, have been indulged in search of beauty. This question which appeared with the origin of world - “what is beauty” is still unanswered and will remain so forever. A common saying “beauty lies in the eyes of beholder” is very correct. There is neither any definition of “normal” nor “beauty” & Its Individual perception. Similar is cosmetic & plastic surgery.
Same surgery which can make one more beautiful and presentable can also make some other worse than before. We all have unique face, features and personality, so our surgery should also be individual. A good plastic and cosmetic surgeon should be able to tailor a surgery for your best.