The range or the spectrum is there and implied for anything in life. The question is: if you take porn free sexual behavior and you overlap watching porn on top of it does the resulting spectrum differ? How do you control the effect porn has on us vs the effect of all the other things we are, as a society, exposed to?
For me porn does not reframe expectations. You still end up fucking and you still end up having to treat the other person as a human being. As long as everyone is having a good time and everything is between consensual adult I'm good.