oh come on, this joke is not dirty by any means...

superman is flying around metropolis when he sees wonderwoman tanning on a rooftop naked.
he begins to think to himself, 'self, i'll bet i could fly down there and just fuck her real quick like, and she would never know it was me...'

so he swoops down, and just gives her the pounding of her life, then flies off.

wonderwoman sits up with a start, and says, "what was that?"
the invisible man says, "i don't know, but my ass hurts all of a sudden."