appearance doesn't rule everything
our life revolves on changes, we can't predict what's gonna happen tomorrow, or the next year. Maybe won't exist anymore due to disease or accident, won't have the same look as before due to accident [kena scratched by robbers or kena acid ]

if people can think in further as to make him/her as a life-long spouse, actually the visage shouldn't be placed on top, as it's a very vulnerable and impermanent. On the other hand, if just for play play, ONS, trials, then looks should be relatively important

among many university books, the one which has most information came from insignificant cover