Isso seria Flies , de Isaac Asimov. Disponível no Arquivo da Internet .
Não foi o protagonista que foi incomodado por moscas, como acontece, mas um de seus velhos amigos. A história foi definida em uma reunião da faculdade.Winthrop would never know. Polen was sure of that. He wondered if Casey knew. It would be the supreme joke if Casey did not.
He had run Casey's flies, of course, not that once alone, but many times. Always the same answer! Always the same unpublishable answer.
With a cold shiver he could not quite control, Polen was suddenly conscious of a single fly loose in the room, veering aimlessly for a moment, then beating strongly and reverently toward Beezlebub.