I'm convinced men who don't like smart women have at least one of the following issues. A) They are not too bright themselves or B) they have low self-esteem.
It is not a myth that some men are "threatened" by intelligent women, just like they are by funny women - since for some curious reason, these are perceived by many people to be masculine traits. If the lady beats you on that front, and you have ego shrinkage problems, you don't want that. You want someone who is clearly below your level in smartness and/or funniness. That is to say, someone reminiscent of a pretty dummy. It's beyond me why anyone would want that, unless of course the reason for dating the person are purely peer/societal pressure or ego-related, and you are not that into all that intellectual challenge and equality.
Then, if you want to have a night out with the guys and your cute but not-too-smart gf raises hell because you never want to be with her instead, ask yourself what went wrong.
This is, thank God, not based on personal experience, but a collection of experiences from other people I have read on different discussion boards.