I've a flatmate who is really clever. He refers to his friend a lot, who has neither been seen/spoken to. This friend is apparently based on his fav musician.
As a child this was a lifeline – it even extended to characters in songs – I was always w/ them, in the forest (I love forests), under the earth / some such place so hearing him talk about it made the hairs on the back of my neck stand up. I was wondering if anyone else has had similar experiences.