Here are a couple of the combinations I've thought of...
Title: That Don't Make It Junk
Line: Any of the lyrics work, really. Pick a line, any line.
Character: Doyle. This is such a Doyle song.
Title: Here It Is
Line: Here is your cross,/Your nails and your hill;/And here is your love,/That lists where it will
Character: Season 7 Spike.
Title: A Thousand Kisses Deep
Lines: Confined to sex, we pressed against/The limits of the sea:/I saw there were no oceans left/For scavengers like me./I made it to the forward deck/I blessed our remnant fleet - /And then consented to be wrecked,/A Thousand Kisses Deep.
Character(s): Wesley/Lilah, AtS Season 4
Edited because I cannot spell.