The four eventually decided to switch swimsuits again, which meant Jon and Biff were now wearing bikinis on their now very feminine bodies while Tiffany and Yukiko were wearing trunks on their now male bodies.
"We should just leave!" Biff exclaimed.
"The gate's locked, and I tried scaling the walls without luck." Jon responded.
"Well, there's four of us now," Tiffany pipped in, "Maybe we should just help each other climb out. Or just smash open the gate! I'm going to go look for something to smash it with!"
Tiffany ran off into the men's locker room.
"Maybe we should all look for something to break down the gate with?" Jon suggested, "Let's meet back here in a bit."
Jon ran into the woman's locker room. He hadn't seen Yukiko follow him.
As he searched locker after locker, she spoke from behind, completely scaring him, "Jon, you're curious about your new body, aren't you?"
His heart was beating fast, "What do you mean, Yukiko?"
"I'm curious about my body too. Would you like to try having sex, Jon? I mean, we could switch back to our own bodies once we break out of here, and when will we ever have this sort of opportunity again? To feel what that would be like from the other side."
Jon hesitated. He had to admit that he was curious. He could feel his new vagina getting moist at the thought. The next thing he knew, he found that he had pounced on Yukiko, and the two were going at it.