There are trees in Africa supporting the same type of fruit, the same species in fact, living within feet of one another, ripening together within days… the only difference being the soil type… in just one troop, certain chimps prefer one tree’s fruit over the others.

Then we also have the fact that the body itself communicates subliminally to the brain, telling it what it needs and then craving surfaces. Potassium, salt, sugar, dairy, vitamin c, etc… The further in age identical twins get the more unlike they become.

When we move away from the human race we tend to forget that the term species does not negate the individual. The broader the term the less distinct its borders. You can have a dog act like a cat, a cat like human, a human like a wolf…

So many variables…