But why is that important? Well, think about other titles that have pairs of names: Romeo and Juliet, Lady and the Tramp, Bonnie and Clyde. A two-name title usually means a romance of some sort. Either that, or it implies an adventurous duo: Butch Cassidy and the Sundance Kid, Batman and Robin, Beavis and Butt-Head, Bill and Ted.
But wait. None of these adventurous duos are women.
The title Thelma and Louise purposefully gives a nod to the genre of adventurous buddy films. After all, it is about outlaws. Since we don't often expect to see women's names up there, the title of the film may not let us know right off the bat that these are women to watch out for, but that's what we call building tension into the title. And tension is what makes things interesting.