LOONEY TUNNES and HITCHCOCK(?) reference

[Cecil]

you know the episode where sylvester cant sleep? someone once told me that it was taken from a hitchcock movie. is this true? which one? or is it from another movie? national inquirer needs to know...

[Sleuth]

Stop leaving 8)

[Cecil]

stop cheating on me.

now someone answer my question or the cute kitten gets it.

[mogwai]

i'd rather watch the kitten die.

[Cecil]

okay, ill keep masturbating then