People with jutting jaws are more likely to have open throats and hence be less susceptible to snoring and sleep apnoea. Chris Worsnop points out that superheroes such as Superman and Batman are often drawn with strong jutting jaws, a feature which, since the time we lived in caves, has been seen as attractive to women. The reason women may be attracted to jutting jaws may have nothing to do with jutting biceps or jutting anything else; it simply makes it less likely they will have to put up with snoring.
Michael McGirr, The Lost Art of Sleep
humour, science