voˇyeur
/voiˈyər/
Noun
A person who gains sexual pleasure from watching others when they are naked or engaged in sexual activity.
A person who enjoys seeing the pain or distress of others.
English teacher here

Had to go to the strict denotation of the word.
I don't see this definition fitting any of the T's I have worked with. That would seem a bit warped.
Maybe the word that works better is personal satisfaction or reward. I've found my T's motivated more by compassion and a need to help others. They also just have a fascination with the workings of the human mind/personality/relationships. They like to "study" people.
Are there a few out there you might fit that definition? Oh probably, but I suspect they are in the minority.