Quote from Woody in The Last Angry Mailman
Woody: I can tell you something we used to, uh, do on the farm. We'd take a fresh laid chicken egg and we'd put on a spoon and hold it over the woman's stomach. If it dipped down, it was female, if not, male. Norm: So how often did you predict the sex of the babies? Woody: Never. This was to predict the sex of the chicken. All right, you take a spoon, right?