I may have been 5 or 6 years old.
I never got the bulb, always the bag.
I got them from my grandmother but mom was in the bathroom as well. She used an amber bag with gussetts on the sides, and attached to the hose was a black curved douche nozzle.They were hot, soapy, fast flowing, and non stop! ....Oh! and the metal hose clamps had only 2 positions. Full ON or Full Off!
When I got up off the bathroom floor to rush to expel, mom noticed I was erect. She seemed concerned as she commented to my grandmother. I interupted with a remark that I get like the when I have to pee.
As a 5 or 6 year old, you can see how I could have thought that be an honest answer.
But as the weeks went by, I'd find myself in the classroom deep in fantasy, giving them to my 1st grade teacher. She always looked great in her 2 pc business suit with the srtight skirt, stockings and black pumps with tall heels. and again would get hard & erect, just by the very thought.......no, i didnt have to pee.
That has not changed, I'm still attracted by ladies dressed like that.
I guess like many here, I found them erotic way before ever knowing what erotic was.