The tale of the three bros and the girl who looked like she was in high school but was hopefully at least a college student

Normally, flying in an airplane is a horrible, brain-destroying experience that makes me feel like several hours of my life have been stolen from me. However, on the flight back from Wyoming (which left from Denver, because Denver is apparently next to Wyoming), I amused myself by watching the interaction between the three bro-ish fellows in the row in …