The point of torture is to get the information they need by any means necessary. Why y'all assuming they're just getting off on torture
Why are you assuming that they aren't? Are you type to really believe someone when they tell you, "This hurts me more than it hurts you." ?? Real life isn't a movie or a Punisher comic.
Nazi's weren't granting honorable and swift deaths to captives who spilled the beans on where they were hiding the jews, bro.
Soldiers aren't either, regardless of what they tell you. Ask the POW's at Abu Ghraib.
I'm not going to mention the Cartel
..unless you count being beheaded & recorded as merciful after being forced to watch your wife & adolescent child suffer the same fate -- even though you told them what they wanted to know.
There is no rulebook or code of ethics. To assume otherwise is naive at best and insanity at worst.