About the eye mask

Many people report sleeping with either one or both arms draped over the facial area. There have been numerous suggestions and theories put forward to explain this, including anxiety, feelings of shame, lack of self esteem and fear of moths.

However, a more thorough investigation by Swedish psychologists found that in order to correctly study sleeping people, most researchers placed their subjects in well lit rooms. By switching off the lights, the Swedish experts think that not one of the people they studied adopted this position.

They cannot be certain however as they could not see what was happening.