I had a clock based 69 joke with Sasuke of 'Naruto', i might be able to retrieve it later. He moves his hand from the 6pm to 9pm position in a near perfect quarter circle (which very well could be a reference to the mangaka's steady hand, lol).
If you truly don't get the joke, as SpiritualFox, i'm going to guess that you're living under a rock, specifically, an evangelical one of some sort. I'm going to guess: Mormon? If i may ask?