"I think it's good when you're in a dark period. The song's your psychiatrist, it's your therapy and you know we have many tales, anyone who writes has," explains Sir Paul, who will celebrate his second wedding anniversary with Nancy Shevell on October 9. "Going away when you're really upset about something and putting it in your song… you come out of that cupboard, toilet or basement and go, 'I feel better.' You've exorcised the demon. So it's one of the great joys of songwriting."
Part of Sir Paul's motivation to continue writing songs is because of the sense of emotional release he feels after a creative session.
"It's like writing your dream out and it's a physical effect where you come back out and you've created magic again, pulling the rabbit out of the hat. 'Where did that come from?' Wahey! It's a great feeling," Sir Paul tells Mojo magazine, ahead of the release of his 16th studio album New on October 14.