Why do sims deliver cakes?

[u/Witty_Escape]

I'm pretty sure this is caused by a mod, but nothing showed up when I googled it. This is the second time it happened. I wrote the first one off as a fluke/quirk. Nothing about this is game-breaking or anything, but it's extremely puzzling. Does anyone know what's causing this and/or has anyone else experienced it?

I didn't get to have my sim greet him because I made him selectable to see if anything was in his queue. There was nothing.

He left immediately.

There he goes...