Two Girls In The Bed

• A vibrating bed is typically a coin-operated novelty found in a vintage motel. For a fee, the mattress vibrates for a duration of time. Alternatively it is a modern bed which vibrates by use of an off-centre motor. It is controlled by electronics for varying time and amplitude settings and is used therapeutically to ease back pains.
• A waterbed is a bed/mattress combination where the mattress is filled with water.