When we want to know if the milk has soured we test it with our nose. This nose of ours is a guardian of what goes in the stomach. That's an important job. When a bee wants to be sure she didn't get drunk on some fermented nectar and arrived at the wrong home address she uses her nose, or rather, the specialized equipment she uses to smell with, her antennae. She goes to the hive that smells right. Who would suggest this is not an important job? Sour milk is not a phero-mone. (Though there is a hive-messaging odor that smells like a kind of cheese.) The hive smell is based on pheromones. The equipment for smelling them, or for smelling just plain odors is very similar. In fact, in keeping with nature's frugality, it's dual use equipment.
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