A large variety of bondage equipment is available for use in BDSM scenes for a number of results. These include rope, straps, or harnesses which can be used to hold limbs together; spreader bars, X-frames which can be used to keep limbs apart; the body or limbs can be tied to an object, such as to chairs or stocks; the body may be suspended from another object, as in suspension bondage; or it may used to restrict normal movement, such as use of hobble skirts, handcuffs, or pony harness. Bondage may also be used to wrap the whole body or a part of it in bindings, such as cloth or plastic (saran wrap or cling film “mummification”) as well as sleepsack bondage.
One of the purposes of bondage in BDSM is to restrain a person (typically called the bottom) in a BDSM position. This may involve simply tying the hands together in front or behind. Other positions involve the use of a waist belt to anchor the hands to the front, back or sides.
Other popular positions are the spread eagle, with the limbs splayed out and fastened by wrists and ankles to bedposts, door frame or some other anchoring point; the hogtie, which secures each wrist to its corresponding ankle behind the back (wider, padded restraints such as bondage cuffs are recommended for this); the balltie, which secures wrists to ankles, in front, with the knees drawn up to the chest; the crotch rope, which involves pulling a rope between the labia to apply pressure to the female genitals.
Sometimes a knot is placed in the rope at the position of the clitoris to intensify the sensation. A crotch rope can also be used on males, either placing pressure directly on the scrotum or including a tie to capture the scrotum. Other positions include the reverse prayer position (not recommended unless the subject has flexible shoulders), and an over-arm tie, in which the arms are brought over the head, and the wrists fastened together behind the head and then by a length of rope, chain or strapping to a belt at the waist.