Some prescriptive grammarians today, such as Paul Brians, would call this spelling incorrect, arguing that the apostrophe denotes a possessive; if the film were made today, the title would probably be Dating Dos and Don'ts. However, "do's" is the more traditional spelling, and was the recommended spelling at the time the film was made. The Merriam-Webster web site lists do's as an acceptable variant
Some prescriptive grammarians today, such as Paul Brians, would call this spelling incorrect, arguing that the apostrophe denotes a possessive; if the film were made today, the title would probably be Dating Dos and Don'ts. However, "do's" is the more traditional spelling, and was the recommended spelling at the time the film was made. The Merriam-Webster web site lists do's as an acceptable variant
