Walking out of the dressing room, you thumb through your wallet. You see your license, police badge, credit cards. In your pocket, you find a large keyring with several keys on it. Apparently, you work occasionally at the prison as a guard. With this information, you decide you want to have a little fun.
Your cock is visible through your pant leg at a thick, seventeen, hard inches. You need to fuck someone, real bad. You think of how you are a prison guard, and how you can have fun with some of the prisoners. But you decide not just any prisoner will do; not if you can make your own with these costumes.
You continue to look through the costumes in the shop, looking for just the right one you want to fuck the brains out of. In another section, you find a collection of mens underwear and boxers. Each package has a picture on the front; this image is what the wearer would look like. You pick out a pair of white boxer shorts, with a thin, but muscular, model on the front. His torso is nice and toned, with a thick chest and hard abdomen. His arms and legs are thick and void of hair. His package looks sizable, but no where as large as yours. You decide this will do.
You walk out to your squad car and off for the prison.
***
Upon arrival, you walk to the back of the prison, to find a secluded cell where no one would see you. You find a man by himself in a cell, by the name of Adam. He was in there for robbery.
"Get the fuck over here," you call to him.
With an unhappy look, he gets off his bed and walks up to you.
"Put these on, now," and you hand him the boxers.
He gives you a puzzled look, but with your forceful attitude, he decides it's better not to argue.
You grin widely as he begins to strip down. He wasn't bad looking to begin with. Nice body, a little bit too hairy, and not a very large package... but all of that would change. You walk in and close the cell door, certain no one will see you.
He completely strips down to nothing. You can see he is turned on by what is happening, because his five inch cock is sticking straight out from his crotch. He pulls the underwear over his legs and over his midsection. You unzip your pants and begin to pull out your python and enjoy the show before you.
Immediately, his body begins to transform. His hair almost completely disappears except on his head, arms, and pubic area. His body tighten and firms as his chest expands. His arms and legs thicken out, as of someone who worked out quite frequently. The prisoner stares at his body with excitement and moves his hands all around his torso. His muscles bulge and contract as if they are magically charged.
Once finished with his transformation, the fun is to begin.