If you're a sports fan you realize that when you meet somebody, like a girlfriend, they kind of have to root for your team. They don't have a choice.

The quote "If you're a sports fan you realize that when you meet somebody, like a girlfriend, they kind of have to root for your team. They don't have a choice" by Jimmy Fallon is a humorous take on the dynamics of relationships and the influence of personal interests, like sports, on romantic partnerships. Fallon, known for his comedic style, is playfully exaggerating the idea that, in a relationship, especially with a sports fan, a partner is almost expected to share in the enthusiasm and loyalty for a particular team—whether they are initially interested or not.

In this quote, Fallon suggests that if you're a passionate sports fan, your significant other is almost "obligated" to support your team because it’s such an integral part of your life. The idea of rooting for a team is often tied to personal identity and can become a shared activity in a relationship. Fallon’s humorous tone implies that the bond between a couple can be strengthened through shared interests, but also that some interests, like sports fandom, are so ingrained that they "require" your partner’s participation, at least to some degree.

By saying "they don't have a choice," Fallon is exaggerating for comedic effect, implying that a partner’s allegiance to a sports team is almost a non-negotiable part of their relationship. This reflects the cultural importance of sports fandom in many relationships, especially where one partner is particularly passionate about their team. The joke here is that, while a partner might not have cared about a sport or team before, being in a relationship with a dedicated fan often means becoming a part of that enthusiasm, whether willingly or not.

Ultimately, Fallon’s quote blends humor with a relatable truth about how relationships can be influenced by shared passions and how partners often have to adapt to each other's interests, even if those interests were previously foreign to them. His playful tone highlights how, in relationships, certain aspects, like team loyalty, can unexpectedly become part of the territory.