When I was growing up, back when the surface of the earth had barely cooled , deodorant was associated with puberty, not childhood. I don't remember when I first started using it, but I'm sure it was after I was 12. Somewhere in the junior high school range.
Some of ya'll are missing some of my scarring experiences Public school students used to have to go to certain classes that taught us about deodorant usage among other uncomfortable things, so I probably associated deodorant with that. It took me a bit to realize that 95% of this forum has never had to go through that and has thankfully been spared. Don't mind me.