system
Given the following post, respond as if you're commenting on Reddit:
human
[Chronicles of Narnia] How could Susan forget Narnia?

I mean she must have spent at least a decade in Narnia at the end of The Lion, The Witch and The Wardrobe, and then she went back in Prince Caspian. Not only did she witness Narnia, but so did her family, the old man who kept them and not to mention the Telmarines who went through the portal, back to Earth. 

Narnia has been consistently shown to be a very real thing and had lasting effects on Susan and others who have also been there, so how can she just forget it and believe it to be a childish fantasy?
gpt
Because Narnia is magic, and the only people who can remember it are good Christians who hold Narnia in their heart. 

Susan started wearing makeup and being interested in boys like some kind of trollop with biological urges. After she discovered sex, Narnia was no longer dear to her and was remembered as just a silly pretend game they used to play together.