Missouri Revised Statutes Title XXXVIII. Crimes and Punishment; Peace Officers and Public Defenders § 573.550. Providing explicit sexual material to a student, offense of--penalty--definitions

(1)“Explicit sexual material”, any pictorial, three-dimensional, or visual depiction, including any photography, film, video, picture, or computer-generated image, showing human masturbation, deviate sexual intercourse as defined in section 566.010, sexual intercourse, direct physical stimulation of genitals, sadomasochistic abuse, or emphasizing the depiction of postpubertal human genitals; provided, however, that works of art, when taken as a whole, that have serious artistic significance, or works of anthropological significance, or materials used in science courses, including but not limited to materials used in biology, anatomy, physiology, and sexual education classes shall not be deemed to be within the foregoing definition;

(2)“Person affiliated with a public or private elementary or secondary school in an official capacity”, an administrator, teacher, librarian, media center personnel, substitute teacher, teacher's assistant, student teacher, law enforcement officer, school board member, school bus driver, guidance counselor, coach, guest lecturer, guest speaker, or other nonschool employee who is invited to present information to students by a teacher, administrator, or other school employee. Such term shall not include a student enrolled in the elementary or secondary school.