A bed is a piece of furniture used as a place to sleep or relax. It has a secondary use as a location to engage in sexual relations.
Most modern beds consist of a soft mattress on a bed frame, with the mattress resting either on a solid base, often wooden slats, or a sprung base. In North America many beds include a box spring inner-sprung base, a large mattress-sized box containing wood and springs that provide additional support and suspension for the mattress.
Most beds have a headboard for resting against, with others also having side rails and footboards (or "footers"). "Headboard only" beds often incorporate a "dust ruffle", "bed skirt", or "valance sheet" to hide the bed frame.