Most Helpful Girls
I think because it wasn't yet explained thoroughly so they looked at it as mysterious and interesting...
Also - it was a metaphor film makers liked using then - a metaphor for whatever the film is about - guilty conscience, hidden desires, etc...
i never took notice to sleep walking in the old movies
Most Helpful Guys
Old movies in the sense of how old? If we are talking about Robert Wiere's 1920 The Cabinet of Dr. Caligari old, well I don't know, point of the movie wasn't sleepwalking. If we are talking about post- 1920's the Somnambulist in Caligari was a quite striking character, let alone the film being one of the most artistic works of it's time. It is hard to not get inspiration from that film.
Because back then we didn't had any of this tech or cars or taboos everything moder. basically. So back then they had to work with what they had.