Often referred to as an Under siege railing system, from the film staring Steven Seagal.
A railing system is used to move object around a room or building. The system usually consist of 2 rails one upper and
one lower, with a
set of wheels attached to a harness which an object can be placed.
Normally a seat and straps is used instead of an object in which a person can
sit. The seat usually contain
one or several holes in which a penis or object can be can be inserted, whilst a person is sat on the seat. A person
will often sit in the seat and another
will move them around the room inserting objects in to the holes contained within the seat.