Had I a man's fair form, then might my sighs
Be echoed swiftly through that ivory shell,
Thine ear, and find thy gentle heart; so well
Would passion arm me for the enterprise:
But ah! I am no knight whose foeman dies;
No cuirass glistens on my bosom's swell;
I am no happy shepherd of the dell
Whose lips have trembled with a maiden's eyes.
Yet must I dote upon thee,—call thee sweet,
Sweeter by far than Hybla's honied roses
When steeped in dew rich to intoxication.
Ah! I will taste that dew, for me 'tis meet,
And when the moon her pallid face discloses,
I'll gather some by spells, and incantation.

John Keats

http://www.poemhunter.com/poem/to-mdash/