That Groucho Marx club quip comes to mind

The Society of Mutual Autopsy  -  Mind Hacks

The brief explanation:

In October 1876, twenty Parisian men joined together as the Society of
Mutual Autopsy and pledged to dissect one another’s brains in the hopes
of advancing science. The society acquired over a hundred members in its
first few years, including many notable political figures of the left
and far left. While its heyday was unquestionably the last two decades
of the century, the society continued to attract members until the First
World War. It continued its operations until just before World War II,
effectuating many detailed encephalic autopsies, the results of which
were periodically published in scientific journals.