Its human nature to be drawn to the water. Universally across cultures, geography and traditions, the bulk of humanity tends to live near large bodies of water. People vacation at beaches and spend leisure time fishing in lakes or rivers. There is nothing more delightful than watching children's inability to pass a puddle without splashing and stomping in it.
Entire industries have developed around water-based recreational pursuits in every country of the world. It must be part of our genetic make up to find water attractive and even mesmerizing.
Exposing your skin to the sun actually signals the body to secrete endorphins. This means decreased stress and a shift in your brain toward relaxation. Scientists have shown that floating in water results in increased blood flow toward your heart, delivering additional oxygen to the brain. As a consequence, you'll likely experience improved alertness and heightened stamina. Now let's talk sound. I'm sure you've experienced how the human psyche finds the sound of waves soothing. This has the effect of changing patterns in your brain, also steering it towards relaxation.
So.... don't resist those urges to shake off your responsibilities for a few hours by the seaside or lake. Embrace it - after all, its human nature!