There is no dark side of the moon, really...

The shower scene has over 90 splices in it, and did not involve Anthony Perkins at all. Contrary to popular belief it wasn’t due to a scheduling conflict Perkins had for the Broadway musical ‘Greenville’ but actually a deliberate decision on Alfred Hitchcock’s part. On this subject Perkins states “Hitchcock was very worried that the dual role and nature of Norman Bates would be exposed if I were to appear in that scene. I think it was the recognizability of my silhouette, which is rather slim and broad in the shoulder that worried him.”
Awh I think Anthony Perkins is adorable.