One of the primary subplots within the film was Jennifer Lawrence's Mystique coming to terms with her true mutant self, and that involved trying to seduce the Beast and after that didn't work out the way she wanted, Magneto.
Most spandex heroes have a symbol on their chest summarizing their character, and so does Power Girl: an empty hole full of cleavage.
Almost as if to make up for that, the second Kick Ass film went way overboard with sex and nudity.