Difference

A four-year-old Catholic boy was playing with a four-year-old Protestant girl in a children's pool in the backyard.  They splashed each other, got very wet and decided to take their wet clothes off. 

The little boy looked at the little girl and said, "Golly, I didn't know there was that much difference between Catholics and Protestants."

Notes: 

Catholic, 天主教徒

Protestant, 新教徒（16世纪脱离罗马天主教的基督教徒）