" In early Judaism, the priesthood was maintained within various families and passed down from father to son, thus necessitating marriage. But this is the old covenant, and even within this model priests were required to abstain from having sex with their wives during the time they served in the Temple. Catholics believe that priests fulfill this Temple relationship ever day - the Mass and the Eucharist mean they are serving in the Temple every day of their ordained lives. "
― Michael Coren , Why Catholics are Right