I enjoy swimming. Do you also like to swim?
No I never learned to swim. I know a lot of people use it for sport, exercise, and fun.
I like swim for exercise and I go to the lake often.
That's cool. It is one of the highest rated recreational sports and some countries even have it part of their curriculum.
Wow. Did you know you can take swimming lessons at your local YMCA?
Yeah, but I don't really have the time. It would be worth looking into since it so low impact compared to activities on land.
You're right. There are many different types of swimming such as, butterfly, backstroke, breaststroke and Freestyle. I like freestyle the best. 
Yeah they are interesting to watch. I love how the body has the ability to float because of it's density.