Swapper Slide: Swapping with nobody

Amanda splashed out at the bottom of the slide, feeling red hot with anger. Her beautiful dark skin was now a pasty white; all her friends were going to think she was going insane or lying or something. She figured that, at least this last time, she hadn't gone down with anybody, so that meant there was nobody to swap with. When she stood up, she heard gasps from the other people around. She looked down, and realized that she was naked... and worse, her swimsuit wasn't the only thing missing!  She shrieked in rage and embarrassment. How was she going to get through life without nipples or a pussy?!?!