I think it's an incomplete premise. Some people are intimidated by intelligence, I honestly believe that some men find it unbearable to even think that women even have the ability to be as intelligent as they are... It permeates much of society mostly do to ancient ideas and outdated religions/dogma patriarchal attitudes etc.
I'd like to think that intelligent people seek out other intelligent people in order to be challenged and to have intelligent conversation... If you can't have an intelligent discussion about a topic, you should either want to be more educated about the topic, or you're not interested/unwilling to change your opinion on it... No-one is so smart that they can't benefit from more information.
I love Natalie Portman! Not sure about the quote. Probably. There are a lot of smart people that don't want to be proven wrong so I they like hanging with people that are less smarty than them. Not sure about the gender bias part. Ok, I don't know enough about the topic so I'll just stop rambling.
I don't know but what I will say is that you never find many girls that hold intelligent conversations at the club,bar, or party. Not saying that it couldn't happen. People today are first attracted to a person's looks more often than their intellect. I'm personally not very smart but I love an intelligent woman. She can teach me everything she knows.