A helpful instruction sheet

My, those two pen-shaped gadgets are way more powerful and versatile than you'd thought. The instructions, in fine print your superb new eyes (being Lissa gives you excellent vision) have no trouble with, are exhaustive, and you set them aside once you know how to skin yourself.

Normally one just needs to concentrate and imagine the zipper pull popping out of one's neck. If that fails there are backup methods.

You shed your cute nightgown. You cast a last fond look in your mirror at what you almost feel is the body you grew up in. You concentrate. There's a sharp little pain at your neck and you have to stop yourself crying out as your Lissa self and memories fade away, leaving only a few sweet traces.

You pull off your hollow Lissa head, and tears flow down your Josh face. Partly you're relieved that the delectable Lissa hasn't been wiped out so that you can be her, but partly you're miserable because you aren't her any more. You've already calmed down by the time you've put on your Josh clothes. You dress the empty Lissa suit in the nightgown as best you can, seal it shut, and wait.

Lissa is restored as quickly as she'd been on the shop floor. "What's it like being me?" she asks. You seize her and kiss her hard. She isn't as enthusiastic as you are but how can she be? "Okay, so what does that mean?"

"If I can't be you I want to marry you," you tell her.

"Normally I'd think that creepy," she says, "but I understand."