I asked you two posts back to offer an example of a law based solely on objective criteria. Are you conceding that you cannot do so? If you are, then you've made my point for me. If you are not, then I will answer your question, once you've answered mine.
Sure I can. I did it earlier - the objective criteria used when prohibiting this activity is "how are people genuinely harmed by the activity?" Not "offended," but harmed. Violence harms a person. So does theft and rape. These crimes all involve tangible harm to a person or that person's property. That's an objective criteria.
Now, if you could kindly provide citations of your claim, as well as the section of the Constitution that authorizes the government to involve itself in private relationships between consenting adults on their own property, I'd be in your debt.