Superman is flying through downtown New York one afternoon and as he is flying over some apartment buildings he looks through a window and sees Wonderwoman lying on her bed spread eagle and butt naked.
"Hey," he thinks. "I could just fly down there, fuck her, and fly back out with such superhuman speed that she will never see me or ever know what happened!"
So, he flies down towards the building, through the window and into Wonderwoman's bedroom. He pumps a few times and flies back out again all with superhuman speed.
"What in the hell was that?" asks Wonderwoman.
Invisible Man, who was laying on top of her at the time replies "I dont know, but it hurt like hell!"