The cartoonist main character fails to grasp that her idea of a sexy Batman is not every woman's idea. It's not dishonest, of course, because it's her idea of sexy. But if you want to know what most women think a sexy guy looks like, romance covers are a useful place to start.
By the by, I agree with her that Batman should be built for dexterity. For me, this is the canonical Batman:
ETA: I hate it when memes lose the names of the artists. The cartoon is by David Willis.