I'm posting this because there was another thread a time back where a well-known poster here said that hearing voices in you head is more common than most will want to admit.

[...]Research suggests that up to one in 25 people hears voices regularly and that up to 40 per cent of the population will hear voices at some point in their lives. But many live healthy and fulfilling lives despite those aural spectres.

Recently, Waddingham and more than 200 other voice-hearers from around the world gathered in Thessaloniki, Greece, for the sixth annual World Hearing Voices Congress, organised by Intervoice, an international network of people who hear voices and their supporters. They reject the traditional idea that the voices are a symptom of mental illness. They recast voices as meaningful, albeit unusual, experiences, and believe that potential problems lie not in the voices themselves but in a person’s relationship with them.
via Drudge
http://www.independent.co.uk/life-st...-10001499.html