I would say that in practice the average guy tends to hook up with a girl (long term) with a slightly lower IQ than himself. This makes sense since guys are said to have a slightly higher average IQ's than girls. So it's just assortive mating. Not that most guys consciously care about a girls IQ one way or the other. We care about girls being hot, and some other personal characteristics that are not really dependent on intelligence. But things typically work out were like is matched to like in terms of IQ and many other things. The invisible hand of the relationship market if you will.
For guys who really do have a very high IQ things get much more complicated since the higher you go the fewer women there are with that IQ. At ultra high IQ level I think the ratio is 1000's of men to 1 woman. i.e. Women's IQ distribution curve is more compressed, men's a bit flatter with more guys very high (or very low) compared to women. Incidentally Harvard's ex-president, Summers, got into massive trouble for pointing this out. In fact it's the reason he is "ex"-president.
So, an ultra high IQ guy has almost zero chance of even meeting a girl at his level, unless they specifically meet through a high IQ society. But even here the problem is that very high IQ is not cost-free. There are negative personal effects - from around 145 I think. But this is for men. Women experience major psychological adjustment trouble at a lower level. There's an interesting, if rather long winded article discussing this, amongst other things, here:
http://prometheussociety.org/cms/articles/the-outsiders
For guys who really do have a very high IQ things get much more complicated since the higher you go the fewer women there are with that IQ. At ultra high IQ level I think the ratio is 1000's of men to 1 woman. i.e. Women's IQ distribution curve is more compressed, men's a bit flatter with more guys very high (or very low) compared to women. Incidentally Harvard's ex-president, Summers, got into massive trouble for pointing this out. In fact it's the reason he is "ex"-president.
So, an ultra high IQ guy has almost zero chance of even meeting a girl at his level, unless they specifically meet through a high IQ society. But even here the problem is that very high IQ is not cost-free. There are negative personal effects - from around 145 I think. But this is for men. Women experience major psychological adjustment trouble at a lower level. There's an interesting, if rather long winded article discussing this, amongst other things, here:
http://prometheussociety.org/cms/articles/the-outsiders