Don't let their smiles fool you. They were freezing.
As soon as the sun comes out and wearing shorts is bearable, the boys start pestering me to take them swimming. I tell them it's too cold. It's not time yet. Just because it's sunny and warm during the day does not mean the water in a deep swimming pool will be warm. You'll freeze your bum off. You'll get sick.
Then I stop mid-parent lecture and think, "If I tried hard enough, I wonder if I could pinpoint the exact moment when I became my parents."