What does her smile hide?

Such a pretty little porcelain doll
with a quaint smile painted in place
wears a never changing expression
one of wonder and of grace

whats the meaning of her smile?
and is it true, or is it fake?
is she thinking of gay memories
or covering up heartache?

is she dreaming up her future
or regretting whats in her past?
or wishing time would slow down
because the days go by too fast?

is she thinking of a loved one
and trying to hold back tears?
not wanting others to see the truth
by covering up her fears?

or is it simply how it seems
that she's content with life?
never bearing a single burden
or dealing with any strife?

Many meanings it can hold
but none the doll will show
because her Mona Lisa smile
has a purpose we'll never know.