What was your earliest speedo experience

[Torchwatch]

When I was 5 and my sister was 7 she wrote in her news book at school
"On Saturday we went to Nanes Hose (Nannies House) and then went to the beach. Big brother put his on, I put mine on, my two little brothers put theirs on but Mummy and Daddy didn't put theirs on."
At the following parents evening my father was asked to explain what it meant. He said that the children had put on swim suits and gone for a paddle while the adults had stayed fully dressed on the beach preparing the picnic and keeping watch.
This was the first reference to me wearing a swim suit and it would have been a black nylon swim brief probably passed down to me from my older brother.
My younger brother always got new stuff as it was worn out by the time I'd finished with it.