Mark suddenly stood up. "I gotta pee."
"No! No! No!" Aidan tried to scream.
"Shut up!" Mark said, and Aidan could no longer speak. Mark walked over the the toilet in the bathroom and lifted the lid. "Aidan, aim into the toilet and piss for me."
Aidan suddenly was pointing straight at the toilet, looking down into it. He felt himself shuddering and an unrest in his "stomach", which was now Mark's bladder. The orange piss began squirting in a jet out of Aidan's mouth. It was absolutely disgusting. It seemed to go on and on until finally, it began to slow down to a trickle and then stop.
"Alright, then," Mark said. "Time to go have some sex!"