If someone came up to you and said they were into Claustrophilia you would probably have no idea what they were talking about. However all of us have experienced the sensations these people crave as a sexual release though we may not all remember those sensations. Think of how we swaddle babies to calm them these tight sensations are pleasurable to a number of people.
Claustrophilia is a sexual desire to be in an enclosed tight space. These can be a box, coffin, vinyl sheeting, even rope if done right. This is a fetish and those that have this fetish should be able to explore it in a very safe very controlled enviroment. If it is not handled correctly then it can become dangerous to the point of being deadly. These tight restrictions can cause some issues such as breathing issues and circulation problems. Such things need to be considered before and during play time.
From what I have discovered through my reading most people enjoy the slowing down of time while being confined. The way they are forced to focus on each breath. The way that they feel as all outside sensations leave their skin and they become completely aware of just their own bodies. The tighter and more restrictive it becomes the more of a “high” their brain gives them and the harder their sexual release is. Like a number of fetishes this is mental release not a so much a physical one. Most of sexual satisfaction is mental from past readings it is something of the nature of 75% mental 30% physical.
There are a number of companies that make things such as sleep sacks and vinyl sheets that enclose a person to the point of very little to no movement. With this restriction in movement also comes a natural restriction in breathing. One of these companies is Winter Fetish they have a number of really nice bondage pieces and lots of vinyl and rubber wear.
One of the things I did find interesting is that because of the study of this fetish there has been some medical advances made for other mental problems such as Autism. The close and calming effect of restrictions brings some people a sense of well being if only for a little while. Another interesting thing I found out while doing research was that a very famous British Spy Gareth Williams was thought to have died from a play session that did not end well.
If you are a person that enjoys or has dabbled in this fantasy I would greatly enjoy hearing about your stories.