A symbiotic relationship in which both species benefit.
Clownfish live among the poisonous tentacles of a sea anemone. The clownfish are protected from predators, and they keep the sea anemone clean.
The act or displaying of affection between two people (most commonly men). It contains a forgiveness clause, and it is not homosexual in any way shape or form.
Dan and Steve radiated with mutualism, accepting one another as an essential part of the other.