Although it doesn't involve a romantic pairing, another beautiful song on the topic of adventurous past lives is worth sharing:: http://www.youtube.com/watch?v=VST2KKIYn50

The lyrics, for those not in a position to listen:

WILLIE NELSON:
I was a highwayman; along the coach roads I did ride,
With sword and pistol by my side;
Many a young maid lost her baubles to my trade,
Many a soldier shed his lifeblood on my blade,
The bastards hung me in the spring of twenty-five--
But I am still alive.

KRIS KRISTOFFERSON:
I was a sailor; I was born upon the tide,
And with the sea I did abide.
I sailed a schooner round the Horn to Mexico;
I went aloft and furled the mainsail in a blow,
And when the yards broke off they said that I got killed--
But I am living still.

WAYLON JENNINGS:
I was a dam builder across the river deep and wide,
Where steel and water did collide,
A place called Boulder on the wild Colorado;
I slipped and fell into the wet concrete below.
They buried me in that great tomb that knows no sound--
But I am still around..I'll always be around..and around and around and
around and around...

JOHNNY CASH:
I fly a starship across the Universe divide,
And when I reach the other side,
I'll find a place to rest my spirit if I can;
Perhaps I may become a highwayman again,
Or I may simply be a single drop of rain--
But I will remain...
And I'll be back again, and again and again and again and again..

--"The Highwayman" by Jimmy Webb; covered in 1984 by the Highwaymen.