Who is Robert Benchley from Dorothy Parker: What Fresh Hell Is This? and what is their importance?

Benchley and Dorothy met while working together at Vanity Fair. He was Dorothy's confidant and non-sexual soul mate for much of her adult life. It could be argued that they had an unhealthy co-dependency and it was a relationship that neither of their spouses understood. When Dorothy was fired from Vanity Fair, Benchley quit as well, claiming that the job was not worth it without her there. Dorothy would call this the greatest act of friendship she had ever known.