What lips my lips have kissed, and where, and why, <br />I have forgotten, and what arms have lain <br />Under my head till morning; but the rain <br />Is full of ghosts tonight, that tap and sigh <br />Upon the glass and listen for reply, <br />And in my heart there stirs a quiet pain <br />For unremembered lads that not again <br />Will turn to me at midnight with a cry. <br />Thus in winter stands the lonely tree, <br />Nor knows what birds have vanished one by one, <br />Yet knows its boughs more silent than before: <br />I cannot say what loves have come and gone, <br />I only know that summer sang in me <br />A little while, that in me sings no more.<br /><br />Edna St. Vincent Millay<br /><br />http://www.poemhunter.com/poem/what-lips-my-lips-have-kissed-and-where-and-why/