When the male pulls out his balls and streches them, like the batwing and puts his balls over the females eyes. She can no longer see, therefore the "lights out" is born.
de zavala mid school's light's went out and i heared from a 7th grader that it was actually fun she said when the lights came on they were in the gym playing a game but the lights went off again and everyone yelled yay and then the lights came back on