This week, the Christmas Cousins welcome Kira Dineen, award-winning host of the DNA Today podcast and a renowned geneticist, to unwrap a fascinating holiday mystery: could there be a genetic reason some people are extra into the holiday spirit?

Kira also shares her family’s cherished Polish Christmas traditions. Whether you’re a holiday superfan or just curious about what’s in your DNA, this episode is a festive, fun, and thought-provoking ride.