Mike the shrinker.

All the talk about Mike's huge dick gives John an idea, he didn't like the fact that Mike had a natrual huge dick, now that he himself had to "mod" his body to get one. So he put a slight curse on Mike. Mike will now be a shrinker, meaning that instead of being a grower, his dick get's smaller on erection. Meaning that Mike no longer would have a 10 inch erect dick, but a 1 inch wonder. John did feel a little sorry for Mike, and increased his "Mikes" flaccid size by one inch, meaning that he now had a 6 inch flaccid dick. Still way bigger than what John himself had before.

Wanting to see Mikes reaction to this, he turned himself invisible and followed Mike into the nurses office.

"Hello Mike!" said nurse Anderson. "Now i heard rumors about you, you being the biggest guy at this school" she said giving him a wink.

"Ohh it's true. About 10 inches erect. Should i just drop my pants so you can see it?"

"Sure Mike, let me get my measuring tape"

Mike took off his pants, he did notice his flaccid penis were slighty bigger, good he tought to himself, i might have an even bigger boner too! and just like that he took a good long look at nurse Andersons huge tits and started to get erect. To his shock, he felt his dick almost defalte, the harder i got, the smaller. In shock he tried to hide it

"now now Mike that's new. A penis getting smaller on erection. Let's measure it shall we? ohh 1 inch, Mike that's hardly 10 inches, i think someting must be wrong with the way you measure"

John had to keep himself from laughing, not wanting to blow his cover, he even got a little bit erect himself, seeing how embarrassing this was.

"Nurse i... it was 10 inches this morning i swear. Look i got pictures of it!" Mike took out his phone, and like magic, the pictures of his 10 inch dick either vanished, or shrunk. Mike ran out of the office, almost forgetting to pull up his pants. John had to leave too, it was his turn next.