What did Hitchcock do in each one of his films?

Hitchcock liked to add shots of a woman's hairstyle, frequently in close-ups. Hitchcock often used a plot device, a hiding place or a place where lovemaking is prepared for. Hitchcock also frequently used the letters "BM," which stand for "Bowel Movement". He often used the "wrong man" or "mistaken identity" theme in his films and the most famous actresses in his films were all blondes.In a lot of his films he used to create more shadows on the walls to create suspense and tension.