Is coffee dangerous after all?

After reading all of the studies about the potential health benefits and downfalls of coffee, I apparently subconsciously decided to conduct my own study this morning. My findings were this: espresso, when applied directly to the left hand, appears to have no health benefits. In fact, scalding one's skin could arguably have a negative effect on one's health. Based on this experiment, I’d suggest that espresso continue to be ingested through the mouth rather than applied to the skin. Others are welcome to repeat this experiment to assess the validity of my results, but I’d recommend that you use someone else (preferably someone you don’t like) as a test subject rather than applying the espresso to your own hand. Ouch.