Many people find something exhilarating about dating someone particularly smart. They find it easier to respect the person and take them seriously. They find the conversation is more stimulating and engaging.
Where it gets complicated is when people also want – or more likely need – other features in their spouse which do not necessarily go hand-in-glove with intellectual brilliance. It is important to be clear whether this is indeed a key characteristic, because if you also have several other priorities as well, finding someone suitable can get challenging.
Many people don’t seem to realize that many types of intelligence play little to no role in one’s likely future happiness in a marriage. It is also vital to understand that there are multiple types of intelligence, and people can be smart in many different ways.