Patrick Bateman's Vanity In American Psycho

In American Psycho, A handsome urban professional named Patrick Bateman who lived in New York City in 1987.
The movie begins with Bateman who is the narrator of the movie explaining his daily routines, which are textbook activities of a high society individual they consist of working, hanging with friends and having a drink on a Friday night. One of Bateman’s associates flaunted their business cards to show his vanity and this is what set Patrick Bateman off.
He seems like a normal wealthy shallow associates that most don’t like, but he lives a double life, he lived a night of murderous activity that include torture, rape, mutilation necrophilia and cannibalism. He then after killing multiple people he had gone into the wrong office building

where he had killed a janitor and that’s where he had called his lawyer named Harold to finally confesses to what he did , to all the murders , but Harold’s answering machine picked up so he left a very long message telling him what he had done. The next day in the morning Patrick Bateman goes to Paul’s apartment expecting to find an apartment full of decomposing bodies but finds it empty. Later Batman goes for lunch with his lawyer and colleagues, when jean finds details drawing batman to the murders.