system
Given the following post, respond as if you're commenting on Reddit:
human
[The Sandman] Do we know exactly what caused Delight to become Delirium?

It's been years since I've read the books, but I can't recall if we ever get a full explanation.
gpt
We're never told straight out and even *Destiny* doesn't know for sure because whatever happened to her isn't in his book.

However, there are hints about what happened. Delirium mentions having been engaged, but never married when her nephew Orpheus has his wedding. Destruction later mentions her broken heart at one time. So we definitely have a broken love affair sometime in her youth.

Then there's Delirium's profound dislike to being touched and especially kissed. In Endless Nights, Delirium's story centers on a rape victim as the only member of Team Crazy being able to reach Delirium, connect to her, and help heal them both.

To me at least, it seems that Delight was engaged to be married and her fiance raped her, with the trauma of that experience driving her change.