Sawyer and Kate love theme, Romancing The Cage, by Michael Giacchino (Original Television Soundtrack for LOST)

Plays during their romantic moments in these episodes:

What Kate Did (season 2)

Every Man for Himself (season 3)

I Do (season 3)

Tricia Tanaka Is Dead (season 3)

Catch-22 (season 3)

The Economist (season 4)

Eggtown (season 4)

There’s No Place Like Home (season 4)

The Little Prince (season 5)

Whatever Happened, Happened (season 5)

LaFleur (season 5)

Namaste (season 5)

Follow The Leader (season 5)

LA X (season 6)

Recon (season 6)