I don't see why it should. If you have been together then why should the label of husband and wife change the relationship, how you act, etc. I feel like living together before marriage is better then marrying and then moving in. Since you can notice the things that bother you and see if you could deal with them.
Most Helpful Guy
It does - it can't help but change things.
The woman usually relaxes more - she has made it, she has a ring on her finger, she has security.
Unfortunately, that can sometimes means she stops taking care of herself and her figure, and stops having sex as often as she used to.
Many men feel betrayed by this, if and when it happens.
The same can happen with men too - he can get fat, lazy, and stop doing romantic things for her. Expect to be waited on hand and foot. And this can also cause resentment in the wife.2