Not sure why that picture goes with that caption particularly, but yeah, as a city kid I also might have been confused about this, except that as a non-Christian I encountered the word “manger” in Aesop’s Fables (the story of The Dog In The Manger) before or at the same time as learning it in the lyrics to some Christmas song or other.
I also thought the lyrics were “Round [the] young virgin, mother and child”, and pictured three people (a virgin, mother and child) after looking up what a “virgin” was in the dictionary, until I later learned the theology of the virgin birth.
My “city kid” moment was when working as a programmer for a military contractor after graduating from college (age 21) and being assigned to work on a helicopter flight planning software module for the Air Force. Specifically, a “moonshadowing” module to account for what parts of the terrain would be under cover of darkness based on a clear night with a calculated phase and elevation of the moon for that part of the world and the time of flight.
I expressed surprise that the moon would be bright enough to cast a shadow significant enough to hide in, and everyone else there (people from Texas and Tennessee) looked at me funny. “You’ve never been out at night when the moon’s up? You’ve never seen the moonlight?” “Sure I have, but it’s not much of a factor on the ground. I mean, the street lights just flood it out.”
Cue the jokes of the value of an Ivy League Education vis-a-vis the Real World.