Why so quick to change last names when married?

[jcampbell115]

Whenever the woman gets married, it's like instantly onto Facebook, Instagram etc to change last name to the man's last name? Why does it even matter in today's age, leave your last name as it is

[SaoirseS]

I got married in April, but won’t be changing my last name until after the first of the new year.

[LazerBean]

Because that's when our name changes.

[jcampbell115]

Nothing says it has to, you can keep your own last name

[LazerBean]

So? We know that, we just also don't care.

[Guy13]

Proper etiquette and recognition