I have to say that that is up to the people that are together, a lot of the time when the physical part is over, it's the comfort of the companionship that will keep a couple together, and other times, it might be a co-dependent relationship.
People will stay together for many different reasons. Just because that part of a relationship is over, doesn't necessarily mean that the rest of it is.
With younger people, now that is a different story. The younger people feel that if they aren't getting that part of the marriage fulfilled, then, they assume that it is over, and will not try to repair that, for whatever their reasons are. Each relationship is different, so each will continue or finish in their own ways. Hope this helps.
People will stay together for many different reasons. Just because that part of a relationship is over, doesn't necessarily mean that the rest of it is.
With younger people, now that is a different story. The younger people feel that if they aren't getting that part of the marriage fulfilled, then, they assume that it is over, and will not try to repair that, for whatever their reasons are. Each relationship is different, so each will continue or finish in their own ways. Hope this helps.