Because every human being is a walking, convenient source of an electrolytic solution. This is something you can do if you're too, too lazy to mix and pour wate

Because every human being is a walking, convenient source of an electrolytic solution. This is something you can do if you're too, too lazy to mix and pour water and salt. The downside is that you'll probably end up with a smelly lamp, and some of the other crud in your urine may muck up your electrodes. I wouldn't recommend trying it, but the question, asked in the hypothetical, was valid and justified.