My Strange Addiction

This list was inspired by the TLC show "My Strange Addiction" yet it is also educational in the sense that human nature in it's unusual tendencies is discussed. Topics may span various areas of health, psychology, addiction, obsession, anxiety, phobia, nutrition, hygeine etc. Feel free to comment on documented cases and add any of your own or those of anonymous others.
This list is in no way meant to defame or mock the program rather it is purely amiable interest that drives the creation of this list.