It was among the students.
This rumor had to do with torture, and many claimed that the many years in the Monastery of pain and pleasure had something to do with it.
Lenny later found that the monastery was thousands of years old.
It was older than any civilization in history, and some more.
Just as in college, there is always a final project before graduation.
Many of those projects had to do with brand new ideas on how to feel either pain or pleasure.
With this, it was no surprise when the rumor was confirmed to be true that a good 95% of the Torture techniques in the world were invented by students from this monastery.
The other five percent are random, innovative ideas.
After all, one must be dedicated to the horrors a person could feel for many such techniques to be created.