I can't remember the name of the movie, but she's talked about it before. It was a '70s film that slipped into the public domain for awhile. Some magician or something accidentally develops actual skill at hypnotism and hilarity ensues. If I remember the discussion of the film correctly, in one scene a blonde pizza delivery gal is lured in and programmed in the middle of a converation. The guy gives her an order of an erotic nature and she says "Oh, OK." I think I remember Daphne commenting that the line delivery was excellent and sexy...and that it kicked off her interest in the genre.
Huh, if you could find more about it I'd love to know the name. For... research purposes.
Actually, that's not a joke.