Karyn touched Jon for five seconds and suddenly she was in Jon's body and Jon was in her body. But the bracelet was swapped along with her mind, because it was Karyn (mentally) that put the bracelet on, not her body.
"This is weird," Jon said, with Karyn's voice. She cupped her breasts with her hands. "That feels weird, too."
"Not as weird as this."
Jon saw Karyn touching between his legs.
"Stop that. That's mine you know. You're just borrowing my body," Jon said.
"Then stop fondling your breasts, I mean my breasts. You know what I mean."
"Fine." Jon stopped touching herself.
"Good. Now, let's see if we can switch back."