A successful conviction for § 28.355/§750.158; Sodomy or "crime against nature" in Michigan requires penetration (People v. Carrier, 74 Mich App 161) though emission need not be proved. Punishment is a felony with a term in prison of not more than 15 years. If a person is labelled a "sexually delinquent person" then the state may punish that person by imprisonment in the state prison for an interminate term, the maximum of which shall be imprisonment for life.
Fellatio is outlawed by the various statutes against "gross indecency"; § 28.570/750.338 Gross indecency between male persons: felony; § 28.570(1)/750.338a Gross indecency between female persons: felony; § 28.570(2)/750.338b Gross indecency between male and female persons: felony. Each is punishable by not more than 5 years in jail or a fine more than $2,500.00. If the state of Michigan labels a person as a "sexually delinquent person" then a punishment of an indeterminate imprisonment is permitted, the maximum of which shall be imprisonment for life.
Fellatio is not considered part of the
sodomy statute (§ 28.355).
[People v. Dexter, 6 Mich App. 247]
Consenting adults are to be punished for certain sexual conduct deemed
indecent.
[People v. Dauer, 131 Mich App. 839]
It is not gross indecency for a male person to touch another male's
genital area over that male's clothing.
[People v. Myers, 161 Mich App 215]
Michigan Criminal Code § 28.221/§750.32 makes it a felony to divorced persons to cohabit together. Unmarried men and women who lewdly and lasciviously associate and cohabit together may be punished by imprisonment not more than 1 year or by fine of not more than $500.00 for the misdemeanor offense.