Superman has always had a big crush on Wonder Woman. One day, while flying over Metropolis, he looks down and happens to see Wonder Woman lying on her bach, spread-eagled on top of a building, totally naked.
Without a moment's hesitation, he flys down, lands on the roof, throws off his cape and clothes, and then jumps on her. He goes at it quite a while, and when he is finished, he rolls off her and says, "Wow! Thank you! That was the best I've ever had in my entire life!"
"Well, you're welcome!" says Wonder Woman. "I just wonder if the Invisible Man will ever walk again."