If you are not going to have kids then there’s no reason to get married. You can be 55 and marry another 55 year old and if she divorces you she can still screw you over big time in divorce court.
There’s no tangible reason for a guy (especially if he is over 40)who is finished having children to remarry again. You are asking for trouble.
I guess that I asked for trouble! Got remarried at 50, we had our first child when I was 60 and the kids are teenagers now... Couldn’t be happier!