They told me that.
There I am, 6 years, old, skinny as a stick, and they say jump into this (unheated outdoor) swimmingpool, lie back and relax, and you'll float.
I didn't.
"You didn't relax". What did they expect? I was sinking!
I didn't learn to swim until I was 14, and I'm still not very good at it. Better BTW in salt water, where I float.
I *always* wear a lifejacket!
Oh, the Mirror? Well that was the source of my son's first capsize. He was about 3, and sitting in the boat while I sailed. Quite breezy, so I was out on the toestraps as far as I could go, when I got a gust. That's OK, free the main. Jib cleated, so it blows the bow down until the main sets again, and in we go. Only for a few seconds, but enough to get him all wet.
Andy