Insects also supplement minerals such as sodium, which are difficult to obtain through flower nectar or sap alone, from human sweat. An image of sweat bees on the body. WikipediaWhen you go outdoors in the hot summer, strangely enough, there are bugs that hover around people. Even if you chase it away with your hand, it flies back, lands on your arm or leg, and doesn't leave. Is it trying to suck blood like a mosquito? Entomologists' explanations are surprising. It's not blood...