0_Apprentice
Hey! I love to swim. What about you?
1_Wizard
Swimming is the self propulsion of a person through water, usually for recreaton, sport or excercise. Have you swam before?
0_Apprentice
Yeah, I said I love to swim! My favorite it outside in a pond in the summer time. What about you?
1_Wizard
I like to swim but one time i almost drowned so i stay closer to the sallow end and tend to not swim much after that sadly. But little fact humans can hold their breath underwater and undertake rudimentary locomotive swimming within a few weeks after birth. It's an evolutionary thing.
0_Apprentice
Wow, really? That's crazy. I started swimming lesson when I was young, but not that young!
1_Wizard
Yeah and swimming is loved so much its consistently among the top public recreational activities. In some countries swimming lessons are a compulsory part of the educational system. I think that's pretty cool. 
0_Apprentice
I never knew that before! Although I think it's a very important skill to have. I mean, if there's ever a boating accident non swimmers tend to panic which is really dangerous for people helping.
1_Wizard
True true. But on average the body has a relative density of .98 and i believe water's density is around 1 so that causes the human body to float on water (there are many factors affecting this but this is just a general fact).