"It's a shrinking serum!" beamed John.
"Why in the world would you wish for that?" asked Karyn.
"I actually did it for you," John said, "I figure a drop or two on each of your breasts and they'll be right back to normal. It's a good loophole for not being able to wish them smaller."
Karyn thought about it for a moment but, to be quite honest, she wasn't that upset about her enhanced bust.
"I don't know," she said, shaking her head, "It sounds kind of dangerous. Did you even test it yet?"
"I don't need to!" said John, "I can always wish up an antidote. That's the beauty of indirect magic."
"Oh, you even have a name for it," said Karyn, coyly, "Well, I'd rather see how it works first."