A latex bodysuit

Once the van had left and John had recovered enough of his wits to be mostly functional, he dragged the surprisingly heavy box into the house. How had that girl managed to haul it all the way to his door, he wondered, it must weigh almost as much as she did?

Another mystery to add to the list, along with what the heck is in this thing? Well, that part of the puzzle should be easy enough to solve.

Fetching a knife from the kitchen, he tore through the layers of cardboard and Styrofoam to reveal his prize. Inside lay a box printed with a photograph of an attractive woman in a red bikini and a well muscled man in blue trunks. The words Premium Deluxe Transforming Bodysuit are emblazoned above the two models, and a white envelope with his name on was affixed to the front with a piece of tape.

Congratulations!

You, Mr John Smith, have been randomly selected to receive this amazing free gift. Yes free!

You are now the proud owner of the very latest model in our legendary transforming bodysuit range. We are sure you are eager to begin exploring the many exciting features of your new suit, but first please take a moment to familiarise yourself with our convenient and easy to follow manual for a safe and happy Transforming experience!

Transforming experience, what was that supposed to mean? John frowned, even more perplexed now than he'd been before reading the letter. Opening the box did little to enlighten him further, inside was a thick paperback book about the size of an old style telephone directory and what he could only describe as a gimp suit made of pale pink latex...