to sew one's shadow back on

[Offroad]

Dear teachers and friends:

Could you clarify the meaning of this sentence?

Talk to Peter Pan, who needs to sew his shadow back on!

Many thanks

Offroad.

[Barb_D]

Have you read the stories about Peter Pan? His shadow came off, and he had to sew it back on. It's obviously very imaginative.

I don't know what this author may mean in terms of using it as a metaphor.