In this comic, we find out that robots determine their gender based on how much talking they do. At first this sounds like something stereotypical and trite...until you realize that the robots only barely understand humanity. Stereotypes are pretty much all they have to go on.
Despite a highly honed sense of self-preservation, Sam enjoys doing things with a high degree of danger and risk. Then we learn that mating is fatal for his species, those of his species capable of breeding do so young, and no member of his species has died of old age. Sam's race effectively has no biological incentive for long-term self-preservation, leading them to take crazy risks in the name of being remembered as they get older.
One wonders how Sam could have accumulated so much debt, when you'd think everyone would know not to loan him money...until you realize that he would probably try to avoid his creditors whenever possible.