Should sex be banned?
So look no one seems to be bothering with this side so here's this. Obviously saying things like "people will have sex anyway" or "this will result in the extinction of humanity" is going to be the main counter argument here, but this really fails to take into consideration how many things there are that everyone knows everyone does but are still illegal. From speeding to digital piracy to drugs, there are an enormous number of laws on the books that are violated by the majority of people as a matter of course.
Adding sex to these gives us a number of distinct advantages. Essentially it makes overt, aggressive or public displays of sexuality extremely difficult to defend. Furthermore, it makes the prosecution of rape vastly easier and more effective. All that needs to be done in such cases is prove that sex took place. The argument that the victim is lying about their lack of consent no longer holds water. Regardless of who did or did not consent an illegal act took place.