Aragorn and the Dead King as to why this trope was casted onto this page. You Didn't Ask : When Frodo and Sam hook up with Gollum to guide them, Frodo asks Gollum to "take us to the Black Gate" of Mordor, which he does. They see how massive and impenetrable the entrance is, and when they are about to make a charge for it anyway, Gollum pulls them back and tells them there is another way in. Sam asks why he didn't mention this before. Well... you didn't ask... In the book Gollum points out that Frodo never told him what his intentions were, just saying that he'd go free if he guided them to the Black Gate safely.