Living together brings all sorts of tasks and responsibilities along with it. Both on a personal level indoors as at a social level outdoors. If we want to create society just and peaceful, we will need to start with it, indoors on a personal level and socially act to that, because the alignment at home is reflected in society and in reverse. In other words, what you intrinsically like, you have to carry out extrinsically. Both verbally and non-verbally, mentally and physically. [Not to confuse with all these external ideas that you've mirrored in the course of time, verbally and non-verbally and otherwise internalized and automated].
Living together means together ensure that we both, everyone on his own and together, can develop in a way that fits with each of us. This is true both at a individual level and on a world scale. As the many conflicts on individual and global level shows, is that not that easy yet. It requires a logical, reasonable, [self]critical and empathic thinking skills, the desire to attune own priorities in a reasonable way to those of others and the assertiveness to expect the same from others. Otherwise you create, whether involuntary or not, egoists and elitist behaving groups and cultures who think pharaotic rights to keep in, and a lot of slaves, who has to refurbish the 'dirty work' they themselves have no desire to.
Sharing a house means that both partners each take up half the home-garden-kitchen tasks. If one of them does not make sense to perform certain tasks and want you to pay for it, you give it - assuming none of that for you - without strugglling or enforcing, verbally your review and distance yourself nonverbally with disgust. If necessary, if nothing changes, by severing the relationship, because maintaining a relationship with someone who does not want to be or become reasonable, or is constantly coming up with all kinds of excuses, is a relationship to continue with a selfish personality who claims an elitist positon and dictates others to remove the tedious chestnuts out of the fire.
Sharing a house with children means that each parent - at least the first three years of each child - at least two days a week stays at home [so together four days a week]. The fifth day the child comes to the nursery, where it also has the opportunity to interact with other children, a group and other adults. From the third year until the sixth year the child will gradually increase to preschool [kindergarten]. Work outdoors is attuned to this. Also in the following years the tasks indoors and outdoors is carefully matched.