Travis Kelce fans are experiencing the 'Taylor Swift effect.' Experts explain why we’re so invested in her love life.

Taylor Swift might be in her NFL WAGs era after attending a Kansas City Chiefs game on Sunday to cheer on her rumored boyfriend Travis Kelce — and the internet can't get enough of it. The singer's appearance at Arrowhead Stadium not only brought smiles to the tight end, his teammate Patrick Mahomes and fans of both the football team and the singer, but also a significant follower increase to Kelce's Instagram, as well as a 400% spike in his jersey sales. At this point it's no secret that Swift's...