Priest Son

I found this comic strip on my bro's desk. It's quite funny, indeed. Click the image to see it larger.

English Translation:

Panel 2
"There are two boys having a conversation."

Panel 3

"In front of a church."

inset: priest.

Panel 4
Boy A: "Hey, can a priest get married?"
Boy B: "Of course not. They can't get married."

Panel 5

Boy A: "What about priest's son? Can he get married?"

Boy B: Yes, he can. Why?"

Panel 6
Boy A: "Then why on earth the priest can have a son?"

Backsound

SIIIING...