There are many types of cuts in porn film. Some are necessary like trying to make a wet scene look dry. Or maybe she just shitted all over and now they need to clean. But there are some cuts that are really upsetting, and they change from person to person. For example some people hate those cuts when they put fake cum in the girl to make it look like the guy creampied her. Those are obviously annoying because I would rather have small amounts of real cum than lots of fake cum.
But for me personally the cuts that really piss me off are the ones when at the beginning of the scene when the girl is first penetrated.
Even if she is a veteran girl, sometimes that first penetration is a struggle because maybe she hasn't been fucked in the ass per days or weeks. And what many producers do is that as soon as they see the struggle in their face they cut the struggle, maybe to lubricate her more or prep her more. So when they continue all of the sudden she is not struggling anymore, and it completely ruins the experience.
The hottest part is in seeing the girl struggle until she doesn't struggle anymore, when you cut that out, you ruin the scene, you are cutting her best efforts, the parts we appreciate the most from girls, that they go through that struggle for our pleasure viewing, and by cutting that out you are showing a lack of appreciation for her sacrifice going through the part before she reaches the enjoyment part that we also love to see, but it is the whole process what makes it good.
Even on a deepthroat, it is simply the most beautiful thing you are cutting. That expression of defeat, I need a break, I don't want to miss those parts, and I don't want go miss the part when you put it again.
Instead they show the dick already inside again, so we miss the second penetration, and this should not happen.