Fig. 32 .—Graph showing the marriage rate of graduates of a normal school, correlated with their facial attractiveness as graded by estimates. The column of figures at the left-hand side shows the percentage of girls who married. Of the prettiest girls (those graded 80 or over), 70% married. As the less attractive girls are added to the chart, the marriage rate declines. Of the girls who graded around 50 on looks, only about one-half married. In general, the prettier the girl, the greater the probability that she will not remain single.
In man, however, there is—nowadays at least—a considerable percentage of unmated individuals. The Census of 1910 shows that in the United States one-fourth of all the men between 25 and 44 years of age, and one-sixth of all the women, were unmarried. Many of the men, and a smaller number of the women, will still marry; yet at the end there will remain a large number, particularly in the more highly educated classes, who die celibate. If these unmated individuals differ in any important respect from the married part of the population, preferential mating will be evident.
