To a certain extent.
extra-marital sex,
Yes
group sex [etc.]
Yes
or anything above and beyond sex for the strict purpose of reproduction?
No - anything beyond sex for the strict purpose of creating a bond between a man and a woman for a lifetime. Of course, the concept of "criminalizing" needs some work, but your real question is do I believe society has a vested interest in the proper use and misuse of sex - similar to society's vested interest in the proper use and misuse of pharmaceuticals.
Who gest to define "sexual license",
I don't think anyone "defines" morality. I think we discover it. And I notice that you have completely ignored the issue of the millennia of historical precedent.
and last but not least, how will offending sexual activity be policed?
The same way it always has been - advertise and pay.
Or, don't ask - don't tell.
To emphasize a point you have not yet addressed (or are ignoring), prostitution has been illegal for as long as I have been alive. Yet I have never worried about an officer breaking in and asking me if the woman I was with was a prostitue. Isn't it odd that we have this sex-related crime, and yet it hasn't exploded into a bedroom police? How do you account for that?
Shalom.
So you would also criminalize divorce.
"Or, don't ask - don't tell."
Oh, I see. You just want to make believe that these things do not exist, and enact unenforceable, worthless laws to satisfy some sort of basic emotional need of yours.