Is Sex Necessary Or, Why You Feel the Way You Do

Is Sex Necessary? Or, Why You Feel the Way You Do is a collection of prose written by E. B. White (the author of children's books Charlotte's Web and Stuart Little, as well as co-author of The Elements of Style), in conjunction with James Thurber (known for such short stories as The Secret Life of Walter Mitty).

The book spoofs the everyday reality of marriage, love and romance. The 75th anniversary edition published in 2004 includes a foreword by John Updike. The book was originally published in 1929.