Family fun: Who is fooling who?

Sharp was seconds away from receiving a vasectomy when his brother and sister-in-law barged in the hospital room holding their newborn baby.

“Stop! You cannot do this!” the brother pleaded. “And why not?” asked Sharp. “How can you castrate yourself when you do not have a single baby? Don’t you want to have a beautiful baby someday like my wife and I have here?”

Sharp said nothing.
The brother grew impatient, “C’mon Sharp, I want a nephew. I made you an uncle four times. Sharp, make me an uncle too. Prove yourself!”

Sharp could not take it anymore. He gave his sister-in-law an apologetic look and asked his brother, “You’re SURE you want a nephew?”

“Of course I do. What would your purpose in life be; a castrated eunuch without children?” “Well congratulations, brother, you’re holding him. You have held them. All four of them. And now, I am fed up!”