How Did Eritis Mea Start?

I was on a cruise in the summer of 2018, not working, not writing, not thinking about stories or anything creative, and I indulged fully in the music of the band that played on some nights on the pool deck and once inside the theatre. The band was made of two singers, both female, and, I think, four male instrumentalists. The singers had accents I couldn’t decipher and one was blonde while the other had dark brown hair. They were both in their late 20s, I think, and quite pretty, but what stood out for me was the way the blonde singer kept glancing over at the singer with dark brown hair while singing, as if taking peeps at her, even though the one with dark brown hair never once looked her way… And of course, my lesfic-soaked mind thought only of one thing… and next thing I knew, I was typing out Eritis Mea as quickly as my fingers would go…