Why would a 28 year old woman be pretending to be a college undergrad online?

One of my friends told me that a colleague at her office seems to spend a lot of her time, posting on Reddit, pretending she's still a student at her old university. She's not trying to plug an OnlyFans or anything like that. We couldn't think of a reason she would bother to do this.

Any ideas why somebody would spend their time pretending to be somebody they used to be?

Why would a 28 year old woman be pretending to be a college undergrad online?
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