SOmetimes, the last post is the only post that has all the other parts tagged to it.

Or, I have a habit of reading really long fics that start off with a favorite rare pairing that somehow transforms to a common pairing.

And while I love that fic, maybe I want the clark/whitney fic and not the clark/lex.

Or harry/charlie instead of harry/draco, etc...

(and sometimes, it's because I can't remember if it's a fic I started to read an dliked and than hated the ending...)