It suck'd me first, and now sucks thee, / And in this flea our two bloods mingled be.
-- Speaker (Lines 3-4)

Importance: This quotation appears in the first stanza after the speaker has asked the lady to consider the flea that has bitten them both. It introduces the notion that they have already been "coupled" through the flea's biting, and asserts that their bodily fluids have already come together the way they would if they engaged in the sexual union that the speaker desires.

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.
-- Speaker (Lines 7-9)

Importance: Here, the speaker is envious of the flea because it is able to "enjoy" the woman's body without "wooing." That is, the flea has access to the woman's skin without the necessity of courting or marriage, which the lady demands of the speaker before they consummate their...