Myth: You can only take swimming lessons during the summer.
Everyone should learn to swim. It's a safety issue, plus not knowing makes you uneasy at events that are supposed to be fun like boating and pool parties. (Even adults can learn, and private lessons are available.)
And to show you how much fun it can be, I present my lovely niece Arwen at her very first swimming lesson!
Yes, she did good enough to get a sucker!