It totally flew over my head then (and I'm probably not the only one). I guess I'm too used to popular science journalism that takes a study with a small correlation or a small effect or a small sample size, and rounds it to the nearest cliche to put a triumphant headline like "SMOKING CAUSES HOMOSEXUALITY", whereas the original study was that in a group of 20 rats, filling their cage with smoke made male-female rat interaction frequency decrease by 7%.