"Maybe Biff wouldn't be such a dick if he lost his for a while?" Jon joked but Karyn was in total agreement. "Great idea Jon. Let's swap their genitals." Karyn said while rapidly moving through the options on the device screen. "Should we do anything else? Swap their underwear maybe? Or something else?" she continued. Jon liked where this was going. He laid out his idea for Karyn suggesting that they swap Biff and Sarah completely from the waist down, feet, legs, hips, butts, genitals and clothing. Karyn found all these options, left everybody but her and Jon unaware and confirmed everything. She hopped down from the wall and encouraged Jon to hurry along with her to try to catch up with Biff and Sarah. The pair eagerly headed towards the school, slowing down only when they were a few feet behind Biff and Sarah.
The changes had obviously happened, Sarah looked the same from above the waist. She was wearing the same blouse as earlier but from the waist down she looked very different, her butt was much flatter than usual and she was wearing a pair of shorts. The parts of her legs visible under her shorts were very hairy. She was walking a bit differently, lacking her usual grace and with her legs spread a bit more than normal to accommodate her newly acquired penis.
Biff on the other hand was still wearing his football Jersey but below that he was wearing a very tight pair of yoga pants which showed off his plump, juicy butt for everyone to see. A faint outline of his panties could be seen through his pants and his hips swayed from side to side as he walked.
Neither seemed to be any the wiser. They were both still walking along like the loving couple they always portrayed. Jon noticed Sarah reach down and pinch Biff's expanded butt through his yoga pants which got a little giggle from Biff. The two stopped at the door of the school and shared a passionate kiss as they were often know to do. Biff stepped in closer to Sarah as they kissed and not so discreetly rubbed her penis through her shorts. Sarah broke the kiss and looked a bit embarrassed. She took her backpack off her shoulder and held it in front of her crotch as she said goodbye to Biff and headed to her locker. Biff sauntered off towards his own locker, greeting some of his friends as he did.
Jon and Karyn just laughed to each other and sadly had to separate to get their own books sorted for their morning classes.
