I think Cobes is around 31-32, no? If so, he probably grew up hearing it on the radio. I've begun noticing myself singing or humming "childhood classics" and for some reason I can never forget them - things like Backstreet Boys, Spice Girls and other late 90s early 00s top 100 tracks, music I haven't listened to on the regular at all since I was a kid.
Josh' mental state has been regressing quite a lot late, despite everything he claims about the duster not affecting him, his lack of social circle that leaves him alone with his thoughts for hours on end.
"you are my fire. The one desire"
Echoing on and on in his otherwise empty skull.