He stalks through the rooms in his underwear at night. And I have to ask him to close the bathroom door. That sort of commonness isn’t necessary.
– Tennessee Williams
A Streetcar Named Desire, Scene 6. Blanche uses animalistic language to complain to Mitch about a near naked Stanley stalking through the apartment at night. This is foreshadowing of Stanley raping her in Scene 10. Her comment about Stanley being "common" also speaks to the theme of social class.