Mich. Comp. Laws § 752.364: “Sexual conduct” defined.

Sec. 4.

"Sexual conduct" means 1 or more of the following:

Representations or descriptions of ultimate sexual acts, normal or perverted, actual or simulated.

Representations or descriptions of masturbation, excretory functions, or a lewd exhibition of the genitals.

"Simulated" means the explicit depiction or description of any of the types of conduct set forth in the definition of sexual conduct under subsection (1), which creates the appearance of such conduct.

"Ultimate sexual acts" means sexual intercourse, fellatio, cunnilingus, anal intercourse, or any other intrusion, however slight, of any part of a person's body or of any object into the genital or anal openings of another person's body, or depictions or descriptions of sexual bestiality, sadomasochism, masturbation, or excretory functions.