I received hearing aids when I was 11 years old, during the summer, before entering fifth grade. I don't recall if it was that summer or the next, but my mother always yelled at me for not wearing my hearing aids when she calls me and has threatened several times to step on them. I have worn my hearing aids religiously ever since. However, when flying on a plane with parents, I always took them off and put them into mom's purse, due to the sound on the plane.
In seventh grade, the vice-principal was very livid with me several times for being late for my next class after gym, as I had to shower (hence, taking hearing aids off). One day, I was in tears because he was being mean when I explained they dropped to the locker below mine. He called me into the office the next day to apologize and it never happened again.
My oldest brother was attending some sort of supper thing with his wife and he took out his Miracle Ear hearing aids at the table. Well, the waitresses were clearing the table, didn't see them and they were scooped up into a coffee cup with coffee still inside. I don't recall if they had to be replaced, but he doesn't do that much anymore (to my knowledge).
About the shower, I never wear them and always take them out. As I get in the shower, I check both ears again, as well as right before getting my head wet, just to make certain they're not still in my ears. It's a habit that I've been doing since getting them, although I should have gotten hearing aids at a much younger age (a long story).