Mich. Comp. Laws § 750.338b
Any male person who, in public or in private, commits or is a party to the commission of any act of gross indecency with a female person shall be guilty of a felony, punishable as provided in this section. Any female person who, in public or in private, commits or is a party to the commission of any act of gross indecency with a male person shall be guilty of a felony punishable as provided in this section. Any person who procures or attempts to procure the commission of any act of gross indecency by and between any male person and any female person shall be guilty of a felony punishable as provided in this section. Any person convicted of a felony as provided in this section shall be punished by imprisonment in the state prison for not more than 5 years, or by a fine of not more than $2,500.00, or if such person was at the time of the said offense a sexually delinquent person, may be punishable by imprisonment in the state prison for an indeterminate term, the minimum of which shall be 1 day and the maximum of which shall be life.
MCL 750.338b