The “Coolidge effect” illustrates how novelty can be a powerful aphrodisiac. According to legend, President Calvin Coolidge and his wife visited a farm and toured it separately. Mrs. Coolidge observed a rooster copulating with a hen and asked how often he mated. The guide replied that it was several times per day, prompting the First Lady to say, “Please mention this to Mr. Coolidge.” When informed of the remark, the President asked, “Always with the same hen?” When told that it was a different one each time, he retorted, “Tell
that to Mrs. Coolidge.”