World Domination skills

My son is now trying to hone his world domination skills.

Today his homework assignment was to write a thank you letter.  In his letter he said

"Dear Mommy

Thank you for the balls.

Fear Caleb."

He'll i'm sure work his way up to "Thank you for ruler ship of your nation, fear me."  But I also wonder if he's really reminding us that someday he will propagate his evil into his spawn, and his testicles are the key.