In my opinion is just another competition. There are lots of competitions in wich some aspect of the human nature is taken in count most, and that doesn't mean it is dregading to anyone. We have female athletics competitions in the olimpic games where the only thing that matters is speed, or strengh or agility, there are competitions of beauty (for both male and female), culture (for both male and female), cooking (for both male and female), we have all sorts of sport competitions, and crazy competitions like purchasing a cheese down a hill. If you say a butt competition is degrading to women because they are treated like sex objects then the female athletics would be dregading to women because they are treated like velocipede objects, for example.