A Japanese company just invented a device that lets you know if you have body odor. It "sniffs" the chemical compounds that make you stink, and it ranks your smell on a scale of one to 10. If you want one though, you'll probably have to buy it from a Japanese website.
Handheld device sniffs pits and other smelly parts, assigns numerical stank ranking. Summers in Japan are awesome. Between the fireworks festivals, all-you-can-drink beer gardens, and Pikachu Outbreaks, there's hardly a dull moment. There are, however, quite a few smelly ones.