Rubies

Often I have heard it said
That her lips are ruby-red.
Little heed I what they say,
I have seen as red as they.
Ere she smiled on other men,
Real rubies were they then.

When she kissed me once in play,
Rubies were less bright than they,
And less bright were those which shone
In the palace of the Sun.
Will they be as bright again?
Not if kissed by other men.