When I was a boy, I had a very weak bladder. Even at the age of 12 - 13, I wet the bed sometimes, and in daytime, when I had to pee, I had to go quickly to a bathroom, to avoid wetting accidents.
At the late 70's, I went for summer holidays to a marine resort on the Italian Riviera: we spent all the day on beach; I do not know to swim, therefore I spent all the time laid down on a towel, wearing swimming trunks.
A mid morning, while I was at the beach, I feel the need of peeing. The beach was a "free beach", this in Italy means no bathrooms or restrooms or toilets on the beach! Swimmers,
adults and childs, peed regularly in the sea; younger boys, till 9 - 10, peed against the wall at the end of the beach.
But I was almost a young man!
So, at first I forced myself to hold it, but in vain. After a quarter hour, I had to go so bad. I thought to let a little out to make myself better, so I did. A wet stain appeared on the swimming trunks. The relief was short: after a few time, I had to go ever more: I realize I was starting to leak, so I looked around to see where I could void my poor bladder.
At the end of the beach wall, there was a corner with a staircase locked with a gate; no people was there, at least I thougt so. I ran quickly there, pulled out my dick and peed.
When I was at the end of the operation, I heard a loud lough. I looked, and at the top of the wall I saw two young girls, aproximately of the same age of mine. they had seen all the pee scene!
I was terribly embarrassed; I would sink into the ground by the shame!