Sometimes you wonder when you hear of the things scientists try to figure out. They don't always seem relevant, but who knows. The space race, after all, led to the development of Tang and Squeeze Cheese.
It certainly lends credence to the idea of birds of a feather flocking together. And the notion that people are attracted to each other by more than the sight of their beauty or the sound of their voice. Your potential mate has to smell good too. At least to you.