I love swimming. Swimming is one of the top recreational activities and in some countries it is part of the regular curriculum.
Swimming sounds like a fun healthy activity.
Yes, it is a great low-impact exercise. 
Sounds like it.  Tell me more.
It is a rebound exercise. There are a ton of benefits. Of course there was a large uptick in people wanting to exercise in mid 1980s
So swimming can help me get in shape?
Yes. Any type of physical exercise will help you maintain fitness and overall health and wellness.
Okay.  Swimming seems to be easier of my joints.
There are also a wide range of positive effects that it has on brain structure and function and cognition.
Brain? So swimming could make me smarter.  Neat!