Strange Rituals
“An essential feature of a ritual is that the actions and their symbolism are not arbitrarily chosen by the performers, nor dictated by logic or necessity, but either are prescribed and imposed upon the performers by some external source or are inherited unconsciously from social traditions. (…)
In psychology, the term ritual refers to a repetitive, systematic behavioral process enacted in order to neutralize or prevent anxiety and is a symptom of obsessive-compulsive disorder.” (wikipedia)