Read the stanza from John Donne's "The Flea." MARK but this flea, and mark in this,
How little that which thou deniest me is;
It suck'd me first, and now sucks thee,
And in this flea our two bloods mingled be.
Thou know'st that this cannot be said
A sin, nor shame, nor loss of maidenhead;
Yet this enjoys before it woo,
And pamper'd swells with one blood made of two;
And this, alas ! is more than we would do.

How does the flea function in this poem?

as an allusion to the relationship between the speaker and the women to whom he addresses the poem
as a personification of the relationship between the speaker and the women to whom he addresses the poem
as a metaphor for the relationship between the speaker and the woman to whom he addresses the poem
as imagery describing the relationship between the speaker and the women to whom he addresses the poem