"Ok everyone. I have an idea" Jon said. "We all appeared wearing swimsuits of the opposite sex, and our bodies started changing to match. The solution to this is easy. We swap swimsuits."
"But, I don't want to get topless in front of strange men", biff said.
"You don't have anything anyone else lacks" Jon said, ... besides, I bet your body is hot, Jon thought to himself.
So Jon and Tiffany stripped off their clothes in the open while Yuki and Biff hid behind Lounge chairs to strip. Jon did notice that Yukiko had a small penis and balls now. Hopefully this would stop the changes if not reverse them.