If it comes up, it typically doesn't though. If someone asks why you root for the niners, you have to provide some type of reason. Usually people root for their local team. Other than that it's typically because their family is from somewhere or roots for that team. Maybe they just liked the team as a child and grew up rooting for them. For someone to start, as an adult, rooting for a team they have no connection to is random. When I meet people who root for random teams (any team other than niners or raiders out here) I'll often ask how they became a fan of that team, as I'm usually curious. I'm simply wondering how you would respond to such a question. Saying you just started watching football 7 years ago doesn't explain WHY you chose to become a Niners fan.