I am a fan of the SyFy show Warehouse 13, and in a recent episode it was noted that the younger male lead always throws "rock" when playing "Rock Paper Scissors." So, when I found this site that has an in-depth analysis of strategies to win at the game, I was interested.
One of the interesting points (and relevant to Warehouse 13) is that males tend to throw "Rock" first.
Go visit the site, and read--it's worth you time--especially if you use Rock-Paper-Scissors to decide who gets to shoot the bad guys first.