My brother and his girlfriend are adorable on game day. They faithfully watch their teams while still respecting each other’s. You visit them on game day and they’ll be hanging out on their couch watching football in their opposing jerseys, sharing playful banter about who’s team is the dominant one.
My brother is diehard Patriots fan and his girlfriend a Seahawks fan. For Christmas this year I made them a sports sign for their front porch combining their teams.