Or, imitation is the sincerest form of flattery.
Or, nothing is truly original anymore.
Or, proof that we share certain traits.
Or, stop stealing my ideas.
Or, hey, cool song.

The point is: "The whole history of human culture evolves through copying, making tiny transformations (sometimes called "errors") with each replication. Copying is the engine of cultural progress. It is not "stealing." It is, in fact, quite beautiful, and leads to a cultural diversity that inspires awe."

via QuestionCopyright