Boards
Men don't watch women's sport because, because women are less good at it.
THAT's why they have to take their clothes off to get noticed. The less good you are at something the less people will want to see (or pay to see) you do it. That's all.
But no. It is, of course, sexism. Good old Guardian:
http://www.guardian.co.uk/commentisfree/2012/jun/07/american-lingerie-football-league-women
Hmmm, interesting...