I was at the supermarket on the weekend, and as I stood in line at the checkout, there was a young mother in front of me with 2 kids, one was an actual baby in a capsule fitted to the trolley, and the other was a little boy of perhaps 4 years of age.
I would've said that the boy was too old to be wearing a nappy, but that's a debate for another time. He obviously was, and I could see the top of his disposable sticking out the back of his red shorts.
As we stood in line, he seemed a bit hyperactive. He wasn't exactly being difficult or a handful, but just wouldn't stand still.
Suddenly he started grabbing the front of his shorts, and said "Mummy, I've gotta do a wee!"
His mother told him they would be finished shortly, and she would take him to the toilet. He was quiet for maybe 30 seconds, but then repeated his request with a bit more urgency. "Mummy, I've gotta go now!"
She just bent over and spoke quietly to him, and I heard her say "It's okay Marcus, you've got your special undies on remember. Try to hold it if you can, but it's okay if you can't."
The line moved on, and he stopped squirming. He didn't make it obvious that he had wet, or was wetting himself, but he stopped moaning about it.
I thought to myself as they walked off what a wonderful feeling it must be to be told that it's okay to do a wee in your nappy in public, and nobody will care.
I am guessing he must be a late potty trainer, hence why he was wearing in public at that age. He obviously knew he needed to go, but still hasn't mastered full control of himself yet.