The physical structure of the body. Dogs and cats are generally "horizontal" because they stand on all fours, while humans are generally "vertical" because they walk upright. If human beings want to swim, they should try to soak more parts of their bodies in water (to increase buoyancy) and let their noses come out to breathe. Although standing can drown enough bodies, standing still and unstable. After all, you are not:

Therefore, to learn to swim, human beings should first put their bodies into the water like dogs and cats.

Simply put, it is lying in the water or lying in the water. Because people need to feel gravity visually to feel safe, generally speaking, the first reaction of beginners is to learn how to lie on the water instead of lying in it (backstroke).

Therefore, when a person tries to learn to swim, he will desperately raise his neck to show his nose. At the same time, because of this action, the body volume immersed in water will decrease, and then the buoyancy will decrease instantly. When gravity exceeds buoyancy, it will start to pull it under the water (which can supplement buoyancy), but often at this time, the fear of falling will make the novice panic. The more flustered, the faster the buoyancy decreases and the worse the fall. A vicious circle ... really, you should try to accept water. If you can accept falling, I believe you will soon find a balance and swim naturally.

And because of the strong plasticity of human movements, you can learn butterfly, freestyle, breaststroke, snorkeling and backstroke in the future. ...

As for the poor dog, why don't you tell him to try backstroke?