"Sarah," explained Jon, "I can make a shrink ray. I can even make an aging ray if we want to be in high school again. But an untwinning ray doesn't make any sense. It looks like I'm stuck as your twin. So here's my deal. I want to make a wish that you'll care for me as a sister."
"What if I say no? Will you force me?"
"Then I can be stuck as your sister, and you'll have someone you hate constantly around you with everyone else expecting you to treat me as part of your family. Do you want that?"
"Fine. Do it before I change my mind."
"I wish that Sarah cares for me as a sister, in a way that I expect a sister to, and not in a creepy way."
"Wow. Jon, I'm sorry about all that. You do get on my nerves a lot but even if you weren't born my sister, you're no longer that guy who ogles us any more." Jon nodded. "So why would you do something as stupid as that?" she continued.
"Stupid?"
"There may be nothing like an untwinning ray, but surely you could wish for a sex change ray. Not all twins are identical. But I can't treat you as my sister unless you are, so you just kept yourself from ever being a guy again. Now let's get to work on that aging ray. Now that you're my sister, I've got some cheerleaders for you to meet...."
