What song lyric does this rebus describe?
Caspar says "Idiots will always enter a burning building."
Melchior says "They will do so, even when no one else will try."
Balthasar says "Not only that, but those dupes will do it quickly."
Wise Men Say Only Fools Rush In (Caspar, Melchior, and Balthasar are the traditional names of the Three Wise Men of Christmas fame; idiots, no one else, quickly enter = only fools rush in), from "I Can't Help Falling in Love" by Elvis Presley
Today's brain teaser courtesy of Braingle.com.