There was again a slight sense of disorientation, like they had missed a moment in time, then they knew.
Reality didn't change because the interesting thing had to happen not suddenly always have been.
Karyn didn't just have a penis, she had Jon's penis, testicles and so on, and Jon had her vagina, ovaries, uterus and related parts.
Additionally their sexual preferences had been altered so that when it comes to genitalia related things they swapped, so Jon now had Karyn’s likes and dislikes when it came to what he wanted to find in his partner’s pants. Even more so they also had the others sexual responses and urges, at least in that area. So Jon would now find himself wanting something inside him when he got aroused. However when it comes to the rest of someone their preferences hadn't changed. Except for one thing, Karyn now liked her "men" with breasts, and she liked them busty, like Jon.
Karyn still had breasts because her previous wish prevented them from being altered. Jon still found breasts attractive on women.
Jon realized that when he had seen the bulge in Karyn's pants earlier he had liked it.
Karyn understood why she was finding it difficult not to stare at Jon's chest.
And it was only the two of them that had changed.
