Experimenting With Yourself

Bradley Voytek has a highly amusing post on the glories of scientific self-experimentation. None of the examples hold a candle to the story of a certain Sir Henry Head dunking his penis in warm water, to test nerve damage and touch:

In the case of [Head:], the tip happens to be devoid of heat-spots but is sensitive to cold and to pain. When... it was dipped into water at 40° C, no sensation of heat was produced, but [Head:] experienced an unusually disagreeable sensation of pain... But, as soon...