I enjoy going swimming especially in this hot summer weather. Do you?
I'm not a good swimmer, but I enjoy the water. It is one of the top recreational activities, and in some countries part of a person's education
You can definitely enjoy the water even if you can't swim well. Swimming relies on the natural/non natural buoyancy of the human body. 
That is true, the body has a density of 0.98 which allows the body to float in the water.
wimming can also be used to rehabilitate injuries, especially various cardiovascular and muscle injuries.
Yes it can. It is very helpful for that. Swimming is very low impact compared to other things done on land.
Some jobs even require people to swim!  Pearl divers and spearfishing both require swimming.
There are many jobs that require the water, that is good for people that love it. I always like watching swimming in the Olympics, it's a good time.