Last Name Changing Sexist?

OK, so I think I might be a bit sexist...I read this article were there guy is asking an advice column about how his girlfriend wouldn't take his last name if they marry...he said its important to him that a family have the same last she suggests that he takes her last name...I mean that totally sounds fair I guess but I guess it kinda would bother me if I was in that situation. I guess I just have a traditional be bothered by it...The only solution I would think of...agree on a new last name for both people which would kind of be fun I think...