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.
As in most cases where one parent is awarded physical custody, Father is given visitation rights as the non-custodial parent -- entitling him to exclusive time with Child every other weekend, on alternating major holidays, and for four consecutive weeks over Child's summer vacation.