I'm not so sure that younger people today really appreciate the enormous bravery that went into the creation and production of that film, or how important a film at the time it really was. ↗
In Psycho IV, the time is five years after III, and Norman is out of the hospital. He's a married man, and he's finally learned how to love somebody and have natural sex without killing his lover. ↗
We were mainly concerned about nudity - how much could be shown in 1959 and how much would convey, without being gratuitous, the terror of being attacked naked and wet. ↗