The whole point was for tradition, to grant the husband an heir (with a son) who could then carry on the family name...
The family name.
You see, there is a certain logic to constancy. Of course, this day and age I guess it doesn't really matter what people say or do...I guess at this point we can all just change our names or take the last name of the wifey and then before too long we will all be related and have children with four heads and four separate names each.
Beautiful world. Oh how I hate it.