Today’s topic is one that I get questions about quite often. A lot of people find confusion between different types of custody. Specifically, I want to cover the difference between primary physical custody and sole custody. Primary Physical Custody: In primary physical custody, one parent has the children the majority of the time and has more responsibility than the other party in taking care of the children. Primary physical custody is used when you have a shared joint physical custody case, meaning that both parents do have access to the children. Normally, one parent has primary time with the child.