If you get a chance to read the book, you’ll see that Peter is not just a delightful companion– his self-absorption, immaturity, and lack of frontal lobe development make him a bit of a danger:
“Certainly they did not pretend to be sleepy, they were sleepy; and that was a danger, for the moment they popped off, down they fell. The awful thing was that Peter thought this funny.
‘There he goes again!’ he would cry gleefully, as Michael suddenly dropped like a stone.
‘Save him, save him!’ cried Wendy, looking with horror at the cruel sea far below. Eventually Peter would dive through the air, and catch Michael just before he could strike the sea, and it was lovely the way he did it; but he always waited till the last moment, and you felt it was his cleverness that interested him and not the saving of human life. Also he was fond of variety, and the sport that engrossed him one moment would suddenly cease to engage him, so there was always the possibility that the next time you fell he would let you go.”
-JM Barrie, Peter and Wendy
Surprisingly, of all the media adaptations I’ve seen, I think Disney got the closest to how the character was originally written.
Barrie himself originally intended Peter to be the villain of the story.
It’s not exactly that Peter is a psychopath, but he’s something just as frightening: a child. Children simply haven’t had the opportunity to develop their empathy fully. To Peter, everything is a game, and when you’re always playing, there’s no such thing as consequence.
In Greek mythology, Pan is the god of shepherds, pastures, and the wild. He’s also associated with sexuality.
Here’s a picture of Pan having sex with a goat:
Pan is also depicted as having the legs of a goat (cloven hooves) and horns on his head, two symbols typically associated with the devil.