Melanie's head struggled to breathe. It was hard to breathe, being an eight-limbed freak with two heads and two opposing sets of genitalia. She thought quickly, "I wish I was a normal person!"
"No!" cried Jon's head.
The wish didn't necessarily contradict the previous one, although only because the way it was worded slipped it through the "dark blue" clause. Jon screamed as he felt his head shriveling into nothingness on Melanie's shoulder. Melanie, meanwhile, felt her four arms and legs becoming two of each. Once it was over, she looked at her arms - dark, like Jon's skin had been. She felt her heart to make sure there was only one - and only then did she realize that the "normal person" she had become was Jon!
"Darling," said a distinct voice in her head, "you know I love you for all time, but I feel this is very inconvenient."
"You and me both," she said with Jon's voice, confirming the existing of his penis. How could she wish her way out of this one?