The Cup Drinking Game

The cup drinking game is where Peter and Patrick sit down and Patrick pours water from one cup to another, and then once in a while Patrick passes the water into his mouth, but then being careful not to drink the water, Patrick spits the water back into a cup and the whole thing starts over.  And what does Peter get to do in all this? -- He only gets to watch Patrick. :-( Peter patiently waits for his turn with the cups of water but Patrick doesn't seem to ever relinquish control.