When you go to the theatre, curtains are used to:Separate the auditorium from the stage, Act as a backdrop,Decorate.When you go to a home, curtains are used for:Light and air control,Privacy,Decoration. In a theatre, the audience, guests or visitors are treated to the front side of the curtain (beautiful view), while the performers soak in the back side of the curtain (ugly view), until they are