I was mildly amused by the granny knickers which were a bit old school even for the mid sixties.
The film industry has always been kind of prudish when it comes to women's underwear for some reason.
Even today, they'll show a woman totally nude, but when it comes to showing her in her unmentionables they expect us to believe that young women still wear 70's style granny panties instead of thongs which are pretty much the standard these days.
Maybe they were standard issue for nurses at the time.
She wasn't a nurse tho, she was an art student. The nurse was the woman he was stalking at the end of the movie.