Did you have imaginary friends growing up?
I have been told that i had an imaginary monkey when I was very small. I told my grandfather he had to change seats at breakfast once, because he was sitting on my monkey.
When I was 16-ish my best friend Juli and I shared an imaginary boyfriend named 'Adam'. We'd leave a seat in between us at the movie theatre for him. He actually saved Juli's life one night when she was driving very late and kept herself awake by talking to him.