There were news reports recently about some group that presented an STD-prevention program in Maryland schools. Their big idea was to have an entire class take turns sharing the same piece of gum. I'm not sure what STD-related point that made.
At any rate, some parents protested and the group is no longer welcome.
But their research presents an interesting glimpse into human nature. Once a few people had agreed to share the gum, everyone else followed suit.
How disgusting would some activity have to be before an average person could be expected to resist the herd impulse? Suppose five people were secretly paid $10,000 each to eat [fill in horribly disgusting item that no sane person on Earth would ever eat without compulsion]. Would the twenty other unpaid people in the room likely follow suit?