Batman is a dickflick

Ok, before I talk about the movie I just want to point out something I noticed in the paper. there were two big ads next to each other. One for Batman and one for Mamma Mia. They both listed their stars like all movie ads and posters do. Batman had 6 men and one woman, and the picture showed only men. Mama Mia listed 4 men and 4 women and had a picture with all of them. The one with half women and half men is considered a chick flick, and the one that has 6 times as many men as women is considered to be for everyone. Just a normal human movie. What the fuck?