This is their definition of “sexually oriented material”:
[A]ny material is sexually oriented if the material contains representations or descriptions, actual or simulated, of masturbation, sodomy, excretory functions, lewd exhibition of the genitals or female breasts, sadomasochistic abuse (for the purpose of sexual stimulation or gratification), homosexuality, lesbianism, bestiality, sexual intercourse, or physical contact with a person’s clothed or unclothed genitals, pubic area, buttocks, or the breast or breasts of a female for the purpose of sexual stimulation, gratification or perversion.”
I can’t help but notice that this would seem so broad as to include the Diary of Anne Frank.