I have three favourite stories.
Firstly, my sister was rather well endowed and had bought a beautiful new bikini. She was about 15 and I was about 8 and she took me to the local swimming baths. Unfortunately, the bow that held the bikini together at the front came off and she was left standing in the middle of the pool with her arms across her chest to cover herself. She proceeded to make me dive under the water repeatedly to try to find this bow. I didn’t find it and she eventually had to get out and run to the change rooms.
Similar story, but this one involved my husband aged about 13 who along with two of his mates was on an Aussie beach enjoying watching a group of girls frolicking in the surf. One of the girls had rather large breasts and her exuberant jumping caused her breast to slip out of her bikini. The result was three young men standing very uncomfortably trying to cover up the resultant erections.
The worst that has ever happened to me is arriving at the cinema in the city only to realise I was still wearing fluffy slippers!