Two little kids, aged six and eight, decide it's time to learn how to swear. So, the eight-year-old says to the six-year-old, "Okay, you say `ass' and I'll say `hell'".

All excited about their plan, they troop downstairs, where their mother asks them what they'd like for breakfast.
"Aw, hell," says the eight-year-old, "gimme some Cheerios."
His mother backhands him off the stool, sending him bawling out of the room, and turns to the younger brother. "What'll you have?"
"I dunno," quavers the six-year-old, "but you can bet your ass it ain't gonna be Cheerios."