Two Brothers

There were two brothers, a seven-year-old and a four-year-old, who shared a room.
One day, the older brother and the younger brother agreed they were old enough to start cursing. "When we go downstairs," the older one instructed, "I'm gonna say 'hell' and you can say 'ass'."
The four-year-old agreed. They went downstairs and their mother asked, "What do want for breakfast?"
"Aw hell", the seven-year old said, "I'll just take some Cheerios."
The mother promptly slapped him and sent him to his room.
At this point, the four-year-old was getting intimidated, "And what do you want?" the mother asked.
"I don't know," the younger one said, "but you can bet your ass it's not going to be Cheerios."