An English chap went to the races and while there he observed Father Tommy who went over to a horse and sprinkled it with holy water. The horse went on to win the race streaks ahead  of the rest of the field.

Then just before the next race he saw Father Tommy go over to another horse and sprinkle it with holy water and like the first horse it went on to win it's race so the English chap said to himself "If that priest sprinkles another horse with holy water I'm going to bet every penny I have on it."

Sure enough Father Tommy went over to another horse and sprinkled it with holy water so the English chap went to a bookie and bet every penny he had on this horse. 

Then the race started and the horse that Father Tommy sprinkled with holy water dropped dead about 100 yards after the start of the race and the English chap was devestated so he went over to the priest and said "What happened, the last two horses you sprinkled with holy water went on to  win their races, and this last one you sprinkled droped dead after only 100 yards, and I had put every penny I had on its nose, what are you  playing at?"

Father Tommy replied"You're a protestant aren't you?"

The Englishman admitted that he was, and said "But how do you know that?"

Father Tommy replied "Because  you don't know the difference between giving a blessing and  administering the last rights."