Select the correct text in the passage. Which two lines in this excerpt suggest the physical union of the lovers?

The Flea

by John Donne (excerpt)

Mark but this flea, and mark in this,
How little that which thou deniest me is;
Me it sucked first, and now sucks thee,
And in this flea our two bloods mingled be;
Thou know'st that this cannot be said
A sin, or shame, or loss of maidenhead;
Yet this enjoys before it woo,
And pampered swells with one blood made of two;
And this, alas, is more than we would do.