[HollyB]

Seems there are some conflicting research out there. This is an older article, but it still offers some differing information.

https://www.sciencedaily.com/releases/2015/05/150519122100.htm

[Polynikes]

Whether it actually works or not isn't the question. What matters is there are people that do believe and the activity that may derive from that. See the following comment #40. Pure evil.