When Blanche and Stella are discussion Stanley, what does he hear Blanche say about him?

Blanche gives a speech telling her opinion of Stanley as common and animalistic, while Stella listens wearily. Stanley arrives home, unnoticed by the women, and listens in on this speech. Blanche compares Stanley to a caveman, his poker night to a party of apes, and exhorts Stella not to regress to Stanley's primitive level but to evolve into a higher level of human.

After listening to Blanche's speech, Stanley steps out and steps back in, this time making his presence known and pretending he had just arrived. In response to Blanche, Stella embraces her husband plainly. Stanley grins at Blanche as she watches.