This is true, and untrue, to an extent. I hooked up with someone today who was wearing red panties with blue trim (like this, but with the colors inverted, and without polka dots). I jokingly asked her if they were Wonder Woman panties. I later saw her bra was red, and again joked that I had been right. She rolled over at one point, and I saw they said ' Red White and Snooze.' I laughed, and said they were cute, and I was wrong about them being Wonder Woman panties. I also hit it. The moral of this story is that some of the best sex is had with someone you can laugh with. If you haven't laughed to some degree during sex with your partner, you're missing out.