- sexual relationships are subsets of human relationships and so one does not require a specific code against infidelity to subsume the wrongness of infidelity in broader moral codes and social
Infidelity does not transgress any universally recognized moral principle. For example, there is no universal principle against lying or against deception, those things are acceptable in some contexts, and unacceptable only in specific cases.
- one cannot move from cheating happens to cheating is good because that commits the naturalistic fallacy
And no-one has, that is a mis-representation of what I said, in two ways. It's plain you feel you cannot respond to my arguments without misrepresenting them. Since you like to name things, you are committing the straw man fallacy.
My argument is that
cheating is normal, not just that it happens, and I move from that not to cheating is good, but to
therefore it can't be bad. It's subsequent, different arguments that I use to argue that it is good. This argument I use merely to assert that it cannot be immoral.
- you cannot move from broader principles and assumptions to cheating is good because that commits the fallacy of falsified inductive generalization.
If you want to argue like that you're going to shoot your own previous argument in the foot. In that case you can't apply general moral principles to cheating either. Whoops.
Except that your argument here is just pedantry. The "cheating is good" claim, separate from the above arguments, is that it is self actualizing because it connects human desire to action, and in the absence of any reason to believe that it is immoral, or even just strongly immoral, that makes it a good thing.
This time try responding without committing the straw man fallacy, I know you can do it if you try.