Superman is out flying around Metropolis one day, when he spots WonderWoman sunbathing on the roof of a tall building. She's completely naked, and spread eagled.
He says to himself, "mmm, I've always wanted a piece of that."
He gets to thinking, "Maybe if I fly down really fast and use my superspeed and zip away, she won't even know what happened."
Finally he decides to go for it. After flying around a bit and getting just the right angle, he zooms down, does his business, and flies away in the blink of an eye.
WonderWoman jumps up in shock, and says, "What in the hell was that!?"
The Invisible Man jumps up and says, "I have no idea, but my ar$e is killing me!"