Heidi

You're on a second date with a woman, and you take her to see a stage hypnotist. She openly mocks the show, calling it fake, then gets called up to participate. She is generally icy, prudish, arrogant, stubborn, critical, and hard to please. The hypnotist puts her in trance and programs a trigger word. Whenever she hears "rosebud" she becomes warm, fun, uninhibited, kind, easy going, and flirtatious. When she hears "icicle" she returns to normal. She isn't aware of her trigger or her changes in behavior. The hypnotist brings her out of trance, returns her to normal, and sends her back to her seat.