It's wrong to have imaginary friends if you're an adult.
Damien has been having a rough few months and is becoming depressed.
Damien wants someone to talk to about his problems.
Damien calls around and ends up booking a therapy session.
Damien invents an imaginary friend to tell his problems to.
Damien achieves profound personal growth through the insight his therapist offered.
Damien's neighbor overhears him talking to himself and has him committed to a psych ward.