Are Parallel Fifths and Octaves Really Forbidden?

Link to book composition lessons: In this video I discuss the contrapuntal sin of employing parallel fifths and octaves, and why they are considered forbidden but yet still appear in the scores of great compositions. For some further reading on the topic, the following links are very helpful, and are definitely worth a look. Parallel fifths and octaves in Bach Chorales: A compendium of parallel fifths found in famous classical pieces: A special thanks as always to and for offering free public domain sheet music and recordings online.