Bondage is the use of restraints for the sexual pleasure of the party or parties involved. It may be used in its own right, as in the case of rope bondage and breast bondage, or as part of sexual activity or BDSM activity.
When a person is sexually aroused by bondage, it may be considered a paraphinalia, known as vincilagnia
Couples do incorporate elements of bondage into their otherwise conventional sex lives at some point in their relationships.
Bedroom bondage games often constitute foreplay. Bedroom bondage is often mild bondage, with one partner voluntarily being put into restraints by being tied up or cuffed, hogtied or spread-eagled, possibly blindfolded, encased gagged etc. by the other, who then sexually stimulates the tied partner at will.
Bondage can be used for purposes other than sexual foreplay. For example, it may be used in erotic tickling, teasing or discipline. The tied partner's satisfaction is often indicated by writhing, struggling or vocalizations. The free partner may derive pleasure from being in a dominant situation, while the tied partner may achieve arousal from being in a largely "helpless" position in the hands of a trusted partner.
Either way, the partners may be playing out the bondage games to act out their sexual fantasies. Many established couples find the experience relationship-affirming, as they both require and imply a level of trust between them that is not normally found as well as being a shared facet of their private and personal sex lives.
Safety rules followed by couples are frequently oral or visual context- and trust-based as the tied partner may be held in a submissive position. Sex therefore takes place with their pre-given consent even in sex games or rape enactment. In contrast a photograph not agreed upon, or actions taken without consent while the restrained person is incapable of resisting can be considered non-consensual.
It is important to discuss what is to occur and place the necessary boundaries to make the experience pleasurable and to provide for an enlightening sexual experience as well.
Bondage and the use of restraints in a BDSM dungeon or similar, where bondage may be an end in itself with no sexual contact is another facet. This is often combined with infliction of pain which gives the sub fulfilment in its own right. This type of bondage is referred to a hardcore.