Beauty is in the eye of the beholder. What looks beautiful to a man may be different from a woman's point of view but it seems that most men consider beauty on the same level and among women's point of view, the variety is far and wide.
Since men are almost aways on the lookout for what is beautiful or sexy, that fact drives women who wanted to be wanted by those men who think so. Since there is such a trend going, media holds on to this item which later come to dictate what the society wants. The like of Total Top 10 publishing their say on who has got the top 10 sexy lips in Hollywood psychologizes men and women alike letting it be known what is the basis for what sexy lips look like. If you will notice, most of them have thick lips, which prod women to have cosmetic surgery just to look sexy.