There is something which is perversely liberating about being bound. Many people dream for years of submitting to a dominant lover or being tied down, and what they find is that they access more free sex pleasure and feel more fully themselves when in these positions of a loss of power. For some, submitting becomes almost like a meditative or Zen state where people lose the need to think or decide and can just feel and experience life for a while. This is poweful stuff and there are many reasons for submissives and bondage bottoms to yearn for this. it is up to the dominants and curious lovers of all stripes in their lives to try and satisfy the urge.
There are many books which offer tips on the use of bondage during sex, and one can even pick up tips from kinky porn. There needs to be negotiation ahead of time to set limits and make sure whatever is done suits their interests. Many materials can be used to bind a lover. Leather of course is a popular choice of porn stars and fetish fans alike, but rope and metal chains also have their fans. Some companies have even begun to offer simple vinyl based restraint systems which can be attached to doors or on the bed or even in the shower.
Many people are interested in the thrill of wearing a ball gag or other form of gag. These either muffle the voice or restrain the user from speaking clearly. Many of them also cause a lot of drooling which adds to the humiliation and submissive feeling of wearing them. In the most standard version, a rubber gag is held in place with straps around the head but many others are available.One may have seen the use of hoods in sex videos but also there are gags which hold the mouth open or are shaped like cocks which the wearer is forced to suck.