Yeah, it's evolutionary psychology 101. Won't change any time soon, though on the individual level it's possible to become conscious of these traits and try to reign them in. Also, some people are more 'tone deaf' to these things than others (ie. I tend not to give a crap about all that signalling stuff, but who knows if that's just a contrarian type of signalling, showing that I'm above all that, so I must be cool, right?). Heh.