“Because you have a fairy living in your bellybutton named Tim and he needs the fluff to keep warm.”
The young boy looked confused.
“What does Tim do?” he asked quizzically.
“As you grow older Tim will always be there to keep you safe and give you good advice. You can talk to him anytime you want.”
The young boy seemed happy with the reply.
He waited awhile then looked at his Grandad with a huge grin and said, “Tim’s your name Grandad.”
Grandad gave the boy a wink and a loving hug.