The abstract moon

At  midnight the moon failed to illumine the lake. 
A girl and two boys entered the lake's  darkness . 
They  paddled  the boat  to find an abstract moon.
They feared  their moon had fallen  to the bottom . 

Girl could not swim but one of the boys could.
The other  went to the lake's  bottom to learn. 
And  he is still learning the perfect way to swim
Remembering the way he had learnt to swim 
As when his life  had begun in  murky waters.

Girl  forgot how to wake up from the paddle boat. 
She was lost in a reverie about an abstract moon. 
Then real  waters sneakily  entered her warm lap.
But she hardly felt their cold against her stomach.
The story only he can tell  who knows swimming.