What's That Even Look Like?

Genesis six four says they were hookeng up with human women. Bible actually says they got married to these women. Susan's marrying a giant. What's that even look like? And then the sex giant on human action, which produced children. There doesn't appear to be an ending to this story. The neplum and apparently everybody else, including the mighty men of renown, or the offspring or everybody, got wiped out in the great flood.