 Hand axes are unlike a peacock’s tail in being detached from the body and so may be passed from one person to another—one reason to doubt their reliability as signals of any particular agent’s suitability as a mate. Where symmetry of the body itself is at issue that objection does not apply, and bodily and especially facial symmetry has been offered as an example of something evolution has tuned our sensibilities to because it is an indicator of health in a reproductive partner. However, robust evidence has been hard to find. One recent study did “not support the idea that facial symmetry acts as a reliable cue to physiological health” (Pound et al. 2014; see also Kalick et al. 1998), another that there is “little evidence that female appearance predicted health” (Foo et al. 2017; this study did support a connection between male facial appearance and fertility). For ethical arguments, supported by empirical findings, that we should rethink our standard approach to the aesthetics of human appearances, see Irvin 2017.