1. certain (genetic) diseases lowers both intelligence and attractiveness
2. I vaugly remember some theory from the early time of population statistics (Galton maybe?), that if successful men (which may correlate with intelligence) tend to marry beautiful women - then on the long run we can expect attractivenes and intelligence to correlate more - but have not heard if it was ever empirically verified or not...
https://en.wikipedia.org/wiki/Berkson%27s_paradox
1. certain (genetic) diseases lowers both intelligence and attractiveness
2. I vaugly remember some theory from the early time of population statistics (Galton maybe?), that if successful men (which may correlate with intelligence) tend to marry beautiful women - then on the long run we can expect attractivenes and intelligence to correlate more - but have not heard if it was ever empirically verified or not...