Arch-Enemies

While I was teaching, a 6-year old Indian boy declared, "I have an arch-enemy. Do you know who it is?" I could guess.
"Who?" I asked.
"It's you!" What a surprise.
"Do you know who my arch-enemy is?" I rebutted.
"Me?"
"No. Former Jewish parody rapper 50 Shekel."
All the little kids in the room break out in laughter.