Here are some additional literary devices in this poem:
As the speaker addresses this woman who has captivated him, he wants her to believe that she should be intimate with him—and now. He artfully conveys this sense of urgency through repetition in these lines:
Now therefore, while the youthful hue
Sits on thy skin like morning dew,
And while thy willing soul transpires
At every pore with instant fires,
Now let us sport us while we may,
And now, like amorous birds of prey,
This is a seductive man, and his intended lover is "coy," as noted in the title. He's pressing her to give in to his desires through this repetition.
"Deserts of vast eternity" conveys the dry and empty future before them when they are old and have lost their youthful beauty and passions. This furthers the idea that she should act now, while she remains an enticing young woman.
Consider this line:
We would sit down, and think which way
The repetition of the w sound in these lines conveys a hollow...
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