I have been trying to pick up swimming lately. Have you tried it?
Sure. I do some swimming. It is basically the self-propulsion through water.
I see, are there different kinds of swimming techniques? 
There is the freestyle and butterfly. People usually swim for recreation, exercise, sport, and even survival.
Yea I read lately about a lady who had to swim for 12 hours to survive in the ocean before being rescued. 
That is incredible. In some countries swimming lessons is part of some kids curriculum in education. It really can save your life.
I agree, swimming should be compulsory for all kids. I can't imagine going on a boat ride knowing I can't swim.
I agree. Swimming really relies on the human bodies natural buoyancy. Some people dont know that and freak out and drown.
Yes you hear so much these about people who go to the beach but dont wear life jackets if they can't swim. 
Anyway, people do participate in swimming as a sport also. There are international, national, and local competitions.