✔ 最佳答案
We don't "have" to change them...it's traditional to do it, and long ago it did represent the woman moving from her family to being part of her husband's family (and also to give continuity because children would also have that same last name)...
At one time women were looked upon much as property and "belonging" to their husband, but that was long ago...the tradition of taking the man's name is still common, but the reasons behind it are different than they originally were...
I know a number of women who kept their maiden/previous last name when they married...it's not at all unusual these days...