Spit: more powerful than morphine
Don’t let the drug warriors hear it, but according to research at the French Louis Pasteur institute, human spit contains a substance “six times more powerful than morphine”, which may just be why people tend to put their fingers in their mouth when they’ve cut them.
An abstract from the research paper can be found at Proceedings of the National Academy of Sciences website, slightly humourous and probably also somewhat inaccurate layperson coverage coming to a local newspaper near you soon.