The Eustachian tube connects the throat and the middle ear (the site of a typical  ear infection ) and allows air to travel between them and equalize the pressures. When the Eustachian tube is temporarily pinched off, pressure can build up in the middle ear.
Visitation is a matter of state law, but generally speaking, every state allows parents to exercise a reasonable amount of visitation with their children, which generally means enough time to establish and maintain a meaningful relationship.
If a child lives with one parent, that parent has sole physical custody and is said to be the custodial parent whereas the other parent is said to be the non-custodial parent , but may have visitation rights or visitation with his/her child. parent with physical custody has the right to have his/her child live with him/her. If a child lives with both parents, each parent shares joint physical custody and each parent is said to be a custodial parent .