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.
By Scott P. Richert. The feast of the Visitation of the Blessed Virgin Mary celebrates the visit of the Mother of God, with the child Jesus in her womb, to her cousin Elizabeth, who was herself six months' pregnant with the forerunner of Christ, Saint John the Baptist.