"Tim, what the fuck is going on?" came the confused voice from his former master, Scott. Hmmm great, he's afraid of shrinking...I could get used to being master, was Tim's thought as he opened his eyes.
The sight that met his eyes wasn't a reduced version of his master filled with terror, rather a confused and slightly grinning Scott, eyes locked on Tim's cock. Tim followed Scott's gaze and saw his own equipment, still hard, now down to 9 inches long.
"What the fuck..." Tim muttered at his reduced equipment, still in shock that he was the one who shrank. He realized how grave an error he had made, using his shrink powers while orgasming but not actually directing them at Scott. With no-one to be loosed upon, they shrank none other then Tim himself. Just as he was getting into the master position.
"That's more like it! Imagine, you being as big as my monster cock, you little slave" boasted an arrogant again Scott. "Hey Scott, I-" BAM was all Tim felt as he turned to look at Scott. Scott had grabbed ahold of his once again hard cock, held firmly at the base, and clubbed Tim with it when he turned around. While normally an entertaining thing, Scott's cock was more then a few pounds when fully hard, and he couldn't recall a time when he had been more hard.
"So slave, since you've clearly got some trick you're not telling me about..." with this he reached down and not-so-delicately took hold of Tim's now smaller nuts "How about making your dear master just a few inches bigger? 15 should do...and NO funny stuff, or I swear I'll crush these little babies here" he gave Tim's sack a very painful squeeze to reinforce his point.