Getting High On Service

They say that our natural instinct to "do unto others as you would have them do unto you" is an actual piece of hard coding that probably halped our species survive. This "mensch impulse" is reinforced by a surege of feel-good chemicaals (srotonin, oxytocin, and dopamine) that the brain produces when we make ourselves available for someone else. In other words, they give us the wrm fuzzies and boost immunity to stave of illness.