Can I cause another person to dream?

Studies show that you can bring about a dream in another person. One way is by holding an open bottle of perfume under the sleeper’s nose. Another is by whistling. A third way is by blowing air across the sleeper’s face with a fan. Someone else can also affect the content of a sleeper’s dream. For example, turning on a light produces happier dreams. And darkening an already bright room can induce nightmares.