I like a look of Agony (Dickinson)

I like a look of Agony,
Because I know it's true-
Men do not sham Convulsion,
Nor simulate, a Throe-

The Eyes glaze once- and that is Death-
Impossible to feign
The Beads upon the Forehead
By homely Anguish strung.

The speaker says that they like a look of agony because it is the one thing that is obviously not faked. By the beads of sweat in line 7, we know that she is talking about an aspect of emotional agony that is so intense that it seems to cause physical pain. The narrator finds beauty in how "homely" anguish is. The fact that it is so evident in a person's life is what makes it so to her. She is not a person who likes being lied to and this is why she enjoys seeing such a true emotion in a person's life. She seems to focus on men when she speaks of the truth of agony. This suggests that she has been lied to before about other emotions. The only time the speaker knows that a man is being truthful is when there is evidence of emotional pain. She says that a man would never "...sham Convulsion,/ nor simulate, a Throe." I believe that the men in her life wouldn't fake these emotions because they know she will see right through them. In this sense they are trapped when they try. The speaker compares the truth of agony to the finality of death. They are both things that can't truely be faked. There are aspects of each (such as "...the Eyes glaze...") that will be noticed as missing if a person were to attempt to imitate either of them.