Another advantage of marriage over fifty is the fact that you no longer play games. Being older and wiser, you realize that you just don't want to waste your time on those petty male/female games most of us used to play. At least that is what Tom and I have experienced.
Life is much more fun when you just relax and do what feels right and comes naturally, instead of doing what you think others expect, or what you were taught is appropriate behavior. As younger people, we also often try to imitate what we perceive as our "roles," rather than just being ourselves. As we age, I think we come to understand that these are all just useless games that we don't want to play.
Tom and I feel we have more of a "take me as I am" relationship. We are better at accepting each other and have learned how to compromise to make each day as happy as possible for both of us. And that is so much easier than playing games!