Correspondence: D. A. Gray, Biological Sciences, Brock University, St Catharines, Ontario L2S 3A1, Canada (email: [email protected]). The genetic correlation between mating preferences and sexually selected (epigamic) traits is a central issue in both Fisherian and good genes models of mate choice (Fisher 1930; O’Donald 1980; Lande 1981; Pomiankowski 1988). One method of demonstrating ...