The motivations, biological origins, and philosophies of the galaxy’s varied species are highly divergent. An object that is desirable to members of one species could be repugnant to another. Those who have mentally cataloged the different species of the galaxy and learned their distinctive traits are skilled in Xenology. Anyone who regularly interacts with the inhabitants of the galaxy’s varied worlds must become adept at Xenology. This is particularly vital for anyone who might need to offer medical treatment to members of varied species, as basic anatomy and biochemistry can vary wildly. Knowledge of various cultural traits is also vital for a character who interacts in a social fashion. A bargaining tactic that is perfectly effective with a Twi’lek might be disastrous when used on a Wookiee.