Attractive people are more likely to be intelligent. Obesity and other "unattractive" traits have negative impact on cognitive functions and IQ. And being smart is attractive trait on its own!
There is no hard and fast rule, but on average the pretty ones tend to be more intelligent.
> When the children were 7 and again when they were 11, their teachers were asked to describe them physically. For the purpose of the analysis below, the children are defined to be attractive if they were described as attractive at both age 7 and age 11.
> Sixty-two percent of the NCDS respondents are coded as attractive.
It is possible that teacher involuntary describe rich students as attractive and poor students as not attractive, or at least there is a bias. Or perhaps it's a bias for some race that is correlated with wealth that is correlated with intelligence. Malnutrition cause learning problems. Poor students get bad schools and not out of school tuition when necessary. It's not a 100% correlation, but perhaps enough to cause a difference in the study.
There's literally a term "law school hot" which means definitely not hot, but hot for a lawyer.
> used to describe women who, in any other scenario would be considered hunchbacked, slovenly, heinous wildebeasts. But, because of their captive audience (law school men) and their alternatives (other trolls, buffalos, and wildebeasts) they somehow garner attraction.
https://www.urbandictionary.com/define.php?term=law%20school...
> And being smart is attractive trait on its own!
Being competent would probably be more accurate. I assume you mean intelligence when you use the word smart here, in which case I would say that most people consider intelligence to be boring. But no one likes an idiot. One can be competent, or perhaps smart (which is really more about decision making than processing capability), without being abundant in intelligence.