What if Marriage Contract has expiration date ?..

It's a little bit funny...this thought in my mind... Well,i saw my driver's license and check on the expiration date. And,it reminds me of few ID's and documents that requires renewal. So,i pull out my miscellaneous files and... dang!!! Hmmmmnnn....why does marriage contract doesn't have expiration date. Then, we are given prerogative whether to renew or now... oppppssss....just a funny thinking... NOTE: DO NOT TAKE SERIOUSLY OK? POSTS AND HAVE FUN