For the past month, none of the girls on this online dating site had replied.
He was depressed, now. All alone in this basement he hadn’t left for weeks, he lived on a diet of Cheetos and Pepsi.
A freak virus had wiped out humanity, but he still didn’t know.
The song was stuck in his head. He couldn’t remember the lyrics, but the melody wouldn’t go away. As he hummed tunelessly, others picked it up and also couldn’t get it out of their heads. Soon, everyone was humming it. And that’s how the song virus destroyed civilization on Earth.