What do you want to know about it, you must have some interest in it or you would not ask ... it's not always sexual it in its self is a Japanese art, there is a Teaneck to it, also safety rules apply when roping the various parts of the body. It's like drawing, every little that is added helps complete the picture. Suspension is only one element, the art of roping is the important side along with the designs made with the ropes. The rope material is hemp, we also take lessons from the instructor once a month. In the place we hire to practice there is no nudity allowed as it is a public building, anyway for us it's not about nudity also the ages range from 20s to 70s.
Reading about it is one thing the experience is the other, it's a hobby, of course you have movement, you are not nailed to a cross. Some will participate in BDSM and the rules of that are consensual and want it when roped most just enjoy the art.