Guess which of these bottles is harmless saline eye drops and which is peroxide carbamate ear drops?
Now guess at 5:30 a.m. when you have your glasses off.
No, I did not put eye drops in my ear.
Which leaves the other alternative. Peroxide in my eye.
Yes, I did. Yes, it hurts more than you can imagine. And that is the last time those two bottles ever share the same shelf.