And the really great thing that happens is when someone says, "Yeah, that code is an ugly hack, and please fix it up, but don't forget good reasons X and Y and

And the really great thing that happens is when someone says, "Yeah, that code is an ugly hack, and please fix it up, but don't forget good reasons X and Y and Z." Then you get to make it batter without regressing, add the proper tests, and document everything properly, all because you spoke to someone first. :-)