Why would you be baffled? They're on the books because people want interfering in a marriage to be punishable by law, just as cheating on your spouse is punishable by law (and if you think it's NOT punished regularly, look at the divorce settlements in a case of adultery).
It might seem ludicrous to YOU, but I assure you, it doesn't seem ludicrous to the wronged spouse.
They are antiquated laws from the days when women were still considered the property of their husbands.
If baffling to me, that any 3rd party could be held liable for the end of a marriage, which is in the laws eyes, simply the desolation of a contract between two parties.
You may prefer your government big and in your personal life, but I don't.
No, YOU think they're antiquated, because you don't agree with them. Has anyone ever bothered to tell you that you aren't the whole entire frigging world, and that you're actually pretty inconsequential?
One more time for the hard-of-thinking: they're on the books because people want them there, as witness the fact that they are, in fact, USED. Truly antiquated laws are virtually never actually applied.
You can yada, yada about "big government" all you like, but since we both know you define "big government" as "anything I don't personally like", it never works, so why bother?
Sounds to me like you just have a guilty conscience and are afraid his wife's gonna find out about you. Or maybe it's "her husband". Whatever. Since you're not in any danger if you have the basic good manners to butt the hell out of people's marriages, your obvious panic on this subject cuts zero ice with me.