Many religions preach that man is head of the household and his wife and children must be obedient to him. This is one reason why abuse occurs. Unless spouses are equal and share responsibilities as mature adults, they will experience a serious imbalance in their relationship. When children are the first concern of both parents, they will find joy in each other as well. It's unfortunate when one of the parents dumps the total burden on the other.
Irresponsible mates pursue self-pleasure.
It's as simple as that. If families work together, they stay together. We're now living in a time when many parents teach their children that marriage is a full partnership. It touches me to see young fathers out with their infants carried in slings next to their hearts, or pushing toddlers in racing prams while exercising. When both spouses participate in child rearing, it makes for healthier, closer families.