Deficiency.

I can't seem
to get enough
                  SUN.

Sick
  & SicK again
      from lack
                    of SUN.


"You are my Sunshine,"
I sing,
"My only Sunshine."

                  But I'm not happy
                  'cause you're always gray.

                  because
                  I'm
                  not

                  your only
                                SUNshine.


And that causes
the clouds
to stay.