I know it's a niche fetish that many won't understand, but that might exactly be ID's intent. I enjoy wearing restrictive braces and casts, even without medical need. They are comfortable, restrictive, and can control you for weeks at a time. They can be worn next to a nun without any offense being taken, yet with any obvious cast or brace, every passerby's head turns to look. It is a slice of publicly acceptable bondage and humiliation.
Example: a medical neck brace is more comfortable and more restrictive than a posture collar, and can be worn for as long as someone else is enjoying it.
Obviously, your milage may vary.