Symbiosis (from Ancient Greek sýn "with" and bíōsis "living") is close and often long-term interaction between different biological species. In 1877 Bennett used the word symbiosis (which previously had been used of people living together in community) to describe the mutualistic relationship in lichens. In 1879 by the German mycologist Heinrich Anton de Bary, defined it as "the living together of unlike organisms."
The definition of symbiosis is controversial among scientists. Some believe symbiosis should only refer to persistent mutualisms, while others believe it should apply to all types of persistent biological interactions (i.e mutualistic, commensalistic, or parasitic) 
Some symbiotic relationships are obligate, meaning that both symbionts entirely depend on each other for survival. For example, many lichens consist of fungal and photosynthetic symbionts that cannot live on their own. Others are facultative, meaning that they can but do not have to live with the other organism.
Symbiotic relationships include those associations in which one organism lives on another (ectosymbiosis, such as mistletoe), or where one partner lives inside the other (endosymbiosis, such as lactobacilli and other bacteria in humans or zooxanthelles in corals).
Owners and Players? NFL and Fans? Leaches and Ticks? More like Players to the Fans. We live in their exploits to a degree. Just like we live in our own Childrens lives, as our parents did us.
•It is believed that the oldest human family member lived about 5.2 - 5.8 million years ago, about 3.6 million years before the first modern human (homo habilis) appeared. It was named Ardipithecus ramidus kadabba, the fossilized bones of which were discovered in 2001 in Ethiopia.
Some might say we have 88,000 generations of humans.
Others might say
The first species of the genus Homo appeared about 2.5 million years ago. The first Homo sapiens appeared about 160,000 years ago.
During the last 1500 years and before the advent of birth control, the average length of a generation has been 30 years. This is known from accurate genealogical records. It is calculated by dividing the number of generations into the years elapsed. I'm sorry I don't have a reference for this. It is born out by my own genealogical work with numerous lines over 10 generations and the lineage of an acquaintance who was descended from Mohammed (his was 29.5). Also, I have seen many other genealogical results close to 30 years per generation.
Using 30 years per generation, Homo appeared 83,000 generations ago and Homo sapiens appeared 5,300 generations ago.
What is the difference between Mammals and other Life forms?
Nuturing and Evolutionary Thought:
Sports fans wish to nuture our players cause we want to win versus the other nuturing Mammals that are not part of our tribe. We are not above ostracizing those that fail our own standards. In all those generations, since we were one family the family is not very familiar anymore. I figured in my own simpleton mind that the actual generations was more like 200 generations. Crap I am related to all of you and every football player ever born. 5000 years and 25 years per family group. Those other million+ years was in-breeding, yep Nascar on Steroids.
Well whatevs, Chiefs fans rise above the general NFL Fan cause we are elite. We Nuture better now, We write entire sentences. We yell louder and RED is cool. 200 Generations of Mankind says so, or just me.