This will make much more sense to those who are familiar with Hitchcock's Psycho (1960).

Taken in Madame Tussauds, London.

Some quotes:

Norman Bates: Oh, we have 12 vacancies. 12 cabins, 12 vacancies.
[...]
Norma Bates' Mother: No! I tell you no! I won't have you bringing some young girl in for supper! By candlelight, I suppose, in the cheap, erotic fashion of young men with cheap, erotic minds!
Norman Bates: Mother, please...!
Norma Bates' Mother: And then what? After supper? Music? Whispers?
Norman Bates: Mother, she's just a stranger. She's hungry, and it's raining out!
Norma Bates' Mother: "Mother, she's just a stranger"! As if men don't desire strangers! As if... ohh, I refuse to speak of disgusting things, because they disgust me! You understand, boy? Go on, go tell her she'll not be appeasing her ugly appetite with MY food... or my son! Or do I have tell her because you don't have the guts! Huh, boy? You have the guts, boy?
Norman Bates: Shut up! Shut up!
[...]
Norman Bates' Mother: [in police custody, as Norman is thinking] It's sad, when a mother has to speak the words that condemn her own son. But I couldn't allow them to believe that I would commit murder. They'll put him away now as I should have years ago. He was always bad, and in the end he intended to tell them I killed those girls and that man, as if I could do anything but just sit and stare, like one of his stuffed birds. They know I can't move a finger and I won't. I'll just sit here and be quiet, just in case they do... suspect me. They're probably watching me. Well, let them. Let them see what kind of a person I am. I'm not even going to swat that fly. I hope they are watching... they'll see. They'll see and they'll know, and they'll say, "Why, she wouldn't even harm a fly...”

Enjoy! x