Conversation so far:
Who were some of Gary Cooper's closest friends?
Ernest Hemingway was friends with Gary Cooper for 20 years.
What was important about Gary Cooper's friendship with Hemingway?
Hemingway believed Gary Cooper's character matched persona, once telling a friend, If you made up a character like Coop, nobody would believe it. He's just too good to be true.“
Which other friends did Gary Cooper have besides Ernest Hemingway?
Gary Cooper was friends with Henry Hathaway, Howard Hawks, William Wellman, and Fred Zinnemann.
Who were Gary Cooper's actor friends?
Gary Cooper's actor friends included Joel McCrea, James Stewart, Barbara Stanwyck, and Robert Taylor.
Did Gary Cooper work with any friends?
Ball of Fire is a 1941 American screwball comedy film directed by Howard Hawks and starring Gary Cooper and Barbara Stanwyck.
What sort of character did Gary Cooper have?
Gary Cooper's close friend Joel McCrea recalled, Coop never fought, he never got mad, he never told anybody off that I know of; everybody that worked with him liked him.“

Question: Can you tell me more about his sense of humor?
Self-contained rewrite: Can you tell me more about Gary Cooper's sense of humor?