You and your girlfriend decided to transform yourself with each other

You spend some time settling in. Both of you are tired from your trip here, and when you ask your girlfriend if she wants to go someplace at the resort for dinner, she declines.

"Tomorrow will be a different story, but tonight I only have enough energy for... you know."

You nod in understanding. "Speaking of, have you thought about what your first change is going to be?" You grab a pamphlet that the desk clerk gave you about how the rooms work and start familiarizing yourself with it.

Your girlfriend looks up at the ceiling and twirls a lock of her gorgeous hair. "I've been trying to decide on something since before we got here. There's so many choices I can't pick, just one to start."

Your eyes land on a paragraph that gives you an idea. "How about this then," you offer. "Let's swap. For this first one, I'll pick your transformation, and you pick mine."

She likes the idea, and it seems to pep her up a bit. You see a gleam in her eye. "Can we do that?"

"I think that's what this says. We can change each other so long as we're both accepting of the arrangement and state all the changes verbally to each other. Do you think you can settle on a single transformation so long as it affects me instead?"

"Hon," she says with a smirk, "I've already got one lined up."