Glossary: Mummification: Immobilising the body by wrapping it up, usually with multiple layers of tight thin plastic sheeting. Breathing and other safety measures must be appropriately taken care of, often by leaving the face (or at least the mouth and nose) open. Body temperature (maintained to an extent by movement) may also be affected so a warm environment and warm aftercare may be important. Mummification is often used to enhance a feeling of total bodily helplessness, and incorporated with sensation play.