Has the Church embraced sex as a means of redressing a decline in church attendance numbers? Presumably the church considers it has recovered from the many years of less-than-positive media featuring the words 'priest' and 'sex' in the same headline.
The calendar is not produced by the Vatican but the priests in question have 'sat' for their portraits which suggests the highly organised and bureaucratic church has given tacit approval to the involvement by the 'sexy' priests. The distribution of the calendar by World Youth Day organisers is demonstrative of this approval.
Feel free to make your own amusing captions to this portrait of a priest and a pussy. Best caption wins a glass of your favourite alcoholic beverage (consecrated wine can be arranged) next time i see you out!