Susan Sontag (post 2): Is her multiple personality, acknowledged in an interview, reflected in her fiction?

I looked at her titles and found two short stories that looked promising.

One is titled “Doctor Jekyll” (1, pp. 229-273). I found that its three main characters are named Dr. Jekyll, Mr. Utterson, and Mr. Hyde, the same names as the characters in the classic “double” (multiple personality) tale by Robert Louis Stevenson.

The other story is titled “The Dummy” (1, pp. 115-126). In this story, an employed, married, family man has a duplicate of himself made to take over his life and leave his original self at leisure. His double does this successfully, but has an affair with the secretary, so the original man has a second dummy made, and everyone is happy.

1. Susan Sontag. Debriefing: Collected Stories. Edited by Benjamin Taylor. New York, Farrar Straus Giroux, 2017.