Bishops are always monks. Although someone who is not a monk may be elected to be a bishop, which frequently happens with widowed priests, he must receive a monastic tonsure before consecration to the episcopate. Deacons and priests, however, are typically married, and it is customary that only monks or married men be ordained. It is considered preferable for parish priests to be married as they often act as counsel to married couples and thus can draw on their own experience. Unmarried priests usually are monks and live in monasteries, though when there is of a shortage of married priests, a monk-priest may be assigned to a parish.