As Karyn looked around Jon's slightly altered room, Jon was doing the pee dance pretty bad. Finally he said, "Shit Karyn, I can't wait, I gotta go!"
Karyn saw him dash to the hallway bathroom and close the door. She clearly heard the toilet seat drop down and then heard a rush of liquid as Jon emptied his bladder. She was sure he had sat down to pee, but WHY he did was a mystery to her. The changes to his room suggested it wasn't simply the power of the stone MAKING men sit down, something must have changed. Then she realized that when she went to pee, she would be standing up! Since she still had the same vagina, that meant she and all other women would now be pissing themselves!
As Karyn stood there thinking about her wish, Jon emerged from the bathroom properly relieved. He looked at Karyn and said "Sorry, I really had to go, we can do that wish now."
Karyn just said, "Umm wait, I....gotta pee too."
Karyn went to the bathroom and closed the door, dropping her pants and underwear she got quite a shock. Her entire womanhood now faced FORWARD! Her labia, clitoris, vagina etc were all still exactly the same, but they were now on the front of her pubic mound facing straight out. Apparently the stone took a relaxed definition of "anatomy", all her parts were the same they had just moved forward. Karyn didn't really have to pee terribly, but decided to check out her gender's new ability.
She stood in front of the toilet and then raised the seat. She then relaxed her muscles and watched as her urine stream shot out of her urethra and went straight out in an arc into the toilet. When she finished she flushed the toilet and put her pants back on. Then, as she was leaving she stopped, turned around and put the toilet seat down. She thought to herself it would be hypocritical of her as a woman not to put the seat down for men after 200 years of women scolding men for the same thing.
Karyn then returned to Jon, who was still standing in his bedroom unaware that his gender had just lost a very convenient ability.