Karyn quickly pointed the device at Jon's crotch and pulled the trigger.
"Hey!" said Jon, "If you make my dick bigger it won't fit in my pants!"
Jon felt a strange tingling sensation in his groin. He pulled out the waistband of his jeans and looked into his underpants. He gasped, and quickly let go.
"Karyn!" he shouted, "It's tiny!"
"Yeah, I flipped the switch to 'smaller', dummy" she gloated. Then she pointed the device at her breasts and hit the trigger twice. Her breasts quickly subsided. She looked down her shirt, and said "Hmm, I think they're a little smaller than they originally were, but I guess that's OK."
Jon said "OK, give me the device so I can restore myself, too."
Karyn laughed and said "Not yet, I want you to show me first!"
Jon cried "No way!"
Karyn said "OK, if you want to do it the hard way" and pointed the device at Jon again...