Chelsea decided to stick with Alice and Tom for now as she continued 'experimenting' with her amazing new power. With their hands and hair swapped, the two potential lovebirds looked peculiar, but not too strange. Chelsea wanted to change that, and she knew the series of changes she wanted to make to the unsuspecting pair... strating with their heights. The now short-haired Alice immediately began growing in height... going from her 5'4"... up to 5'5"... 5'6" and all the way to 6ft tall, and conversely, Tom shrank down to Alice's former height, meaning the girl he had a crush on now towered over him.
"Oh this could definitely be addictive." Chelsea reasoned, giggling to herself as she concentrated on making her next 'drastic' swap. Still holding her books to her chest, Alice made it difficult to see the results of this next swap, but fortunately Tom was stood with his hands in his pockets, so there was no obstruction of his chest as Chelsea watched two feminine mounds forming under his dark red t-shirt. Tom's chest swelled outwards and his nipples turned puffy and feminine as he gained Alice's breasts. Glancing back to Alice, Chelsea could at least see that the books she held were now flat against her manly chest. Amazingly enough, through the changes, the students' clothing seemed to adjust to fit. Tom even had Alice's former bra under his t-shirt, securing his new tits.
Feeling herself getting aroused, Chelsea fanned herself with her hand a little before making the next swap between the flirting pair. This time, just before she focused, a wicked little smirk appeared on the professor's attractive face.
She heard Alice laugh out loud at something Tom had said to her, then she saw Alice shifting her stance a little, shuffling her feet as her tartan skirt began to bulge out in front... courtesy of the 7-inch penis growing between her legs. Meanwhile, the impressive bulge in Tom's jeans diminished into nothing as he acquired the pussy of the girl he was hitting on. It was clear, judging from the tent pitched in her colorful skirt, that Alice now had the raging boner Tom had been sporting moments ago.
It was the genital swap between ther two students that really got Chelsea's hormones going, and she found herself occasionally rubbing her vagina through her own skirt as she watched her two 'victims' continue to flirt, completely unaware they were having their physical traits exchanged... including their sex organs. And it was also at this time, that Professor Yamamoto began to get especially curious about what having a penis would feel like.
She would have to find out for herself soon, that was for sure...