Elementary school teachers use the stare perfectly as a method to quiet a disruptive student. Many people discuss how they stare someone else down , as a way to show how staring can indicate their mood and feelings. When we blink at someone, we show a feeling of flirting or interest. Thus, the precocious female will repeatedly blink at the male to whom she is flirting. People who are truly in love for the first time find it difficult to take their eyes from one another.
People also blink or close their eyes to show displeasure with someone else.
Thus, when a person closes his eyes while addressing someone, he is telling the person that he considers his opinions of little merit.