If you want more context, it was usually the employees of the company I founded that told me I needed to shower. It's not like I had flies swarming around me. Rather, they'd walk into my office and sniff and let me know it was about that time.
This seemed very efficient to me. Why go around guessing when you need to shower when others can more tell you more accurately?
But different strokes for different folks. I'd rather be known, not for my complete lack of odor, but for having an independent intellect.