2014, Vern L. Bullough, Bonnie Bullough, Human Sexuality: An Encyclopedia, Routledge, →ISBN, page 26:
The original Kinsey scale was established using sexual behavior as the sole criterion. Complicating factors (e.g., love, sexual attraction, fantasy, and self-identification) have only recently been used to enhance it. […] It does seem, however, that when all of the factors are considered, an individual's rating may change over time. That is, the individual may be a Kinsey 2 at one time and a Kinsey 5 at another; the rating should not be viewed as being fixed, describing all behaviors, or predicting future behavior.
