Somegeezer, I don't know about your part of the world, but in the U.S. there are legal issues to consider, especially if children are involved.
Much of my motivation to get married was to protect my daughter and her father and to make sure that, if something were to happen to me, clear rights of inheritance and custody were established.
Were my husband and I not married he would not be as well-protected under the law in the event of my death. I could definitely see my mother trying to get custody of our daughter and my money, and wills can be contested.
Also, our medical insurance is through his job. Being married helps there, and with our taxes.
Hinge of a V relationship with my husband (Thumper) and boyfriend (T-Rex). Also, mother of a 6 y/o girl by my husband.
My poly story begins here
. Now with new blogging