Klinger Was Not Written As A Straight Character
Klinger is a character who was only supposed to make one appearance. He was also supposed to be gay. He went on to be one of the most popular characters on the show, which is a great feat.
They Toned Down The Laugh Track
When the show started, the producers did not want to have a laugh track to put an emphasis on how serious the subject matter was. CBS did not agree but let them do without one when it came to scenes in the operating room. If you watch the show, the canned laughter got mixed lower as time went on.