Any man who shall seduce and debauch any unmarried woman shall be guilty of a felony, punishable by imprisonment in the state prison not more than 5 years or by fine of not more than 2,500 dollars …. —Michigan Penal Code § 750.532
As a former Michigan resident, I was guilty of a half-dozen or so such cases. My defence would be that in most cases. I was the one who was seduced and debauched. And I was ignorant of the law, though “ignorance of the law is no excuse”.
The shocking thing is that this law is still being enforced, generally as a plea bargain.