Great question. The answer is very simple though. They are a metallic balls charge d with positive ions. Everyone that plays this game has a negative attitude. Just like the opposite poles of two magnets, the positive sticky 'nades are attracted to negative players.

What makes jello so jiggly?

I hear it's honey from the sun. Rumor is you catch more flies with it. It burns you with it's glowing love until you explode. *I'm bored and went hard on the cheese*