Knowledge: For the ancient Greeks, fishing was not just a means of sustenance, but a fun and interesting activity. Many people find swimming to be enjoyable.

Conversation:
I love to go swimming because its fun and its a good workout.
I see. Swimming is among the top creational activities for the public. Some countries even have swimming lessons in their educational curriculum.
That really interesting! What are some of the top swimming competitions held around the world?
As a professional sport you can find swimming in many local, national and international competitions and, of course the summer Olympics.
Thats cool! I love that so many different people can enjoy a sport.
Indeed, humans have an evolutionary response to basic locomotive swimming when they are just a few weeks old.
Wow! That's interesting. I find swimming to be a fun activity.

Response: Indeed! Many people find swimming to be entertaining.