Why Catholic Priests Can't Marry (at Least for Now)

The Roman Catholic Church bars most married men from becoming priests, but that rule, could, in theory, be changed.
Priestly celibacy is rooted in tradition, not Catholic dogma, so the pope could change it overnight.
So far, Pope Francis has given little indication that priestly celibacy is on the chopping block. However, Archbishop Pietro Parolin, the Vatican's new secretary of state and Pope Francis' No. 2 man, has said the issue is open for discussion, though still a firmly rooted Catholic tradition. [Papal Primer: History's 10 Most Intriguing Popes]
Those who are happy with the current rules say priestly celibacy allows priests time and energy to focus completely on their flock and to emulate Jesus, who was unmarried, more faithfully. But those who would like to see married priesthood argue celibacy is so difficult for many men that it dissuades people from the priesthood and can lead to sexually immature people pastoring their flocks.