Struggling to express your feelings? Get an imaginary friend

Comedian and author David Walliams recently revealed he has clung on to the friends he invented as a child - something that can help even adults make sense of emotions, says psychotherapist Philippa Perry

Comedian and children's author David Walliams recently said that the make-believe companions of his childhood were still with him. "They're still my friends - they're not imaginary, are they?"

Being a psychotherapist with no sense of humour, I am going to answer Walliams's question seriously.