Research into the microbes that lie within our gut is constantly being explored. These microbes can affect our weight, mood, our vulnerability to allergies, disease and infection. They can also have an effect on how sexy we are perceived. Researchers at M.I.T. are calling it the “glow of health”. They are finding that these microbes may have a strong effect on our skin, hair and even our stride when walking. Tests were done on male mice in which they were given human breast milk. They not only developed thick lustrous fur but had an increase in testosterone which resulted in larger testicles making them a rodent heartthrob. Female mice showed stronger anti-inflammatory markers, had healthier pregnancies and tended to their off springs in a more caring and loving way. This may suggest that not only do these healthy microbes create hormones that have a tendency to draw healthier people together but in so doing can also ensure their own survival. In another study done in Switzerland, researchers concentrated on the microbes that were responsible for body odor. Women were asked to sniff tee shirts worn by various men. The women preferred the tee shirt worn by a man whose immune system was opposite theirs. This in turn would ensure a healthier offspring with a wider variety of microbes. Having healthy gut bacteria may prove more beneficial then hair gel when seeking a mate.