Jagger's father doesn't like cake, so we bought him donuts for his birthday.
Jagger: "I'm trying to figure out how we're going to put 18 candles on one donut."
Jagger's brother: "Jagger, if Dad was 18 years old, that means he would have been 9 when you were born and 3 when I was born."
Jagger: "Well, DUH! Do you think I don't understand simple math? I was planning to put 18 candles on NINE donuts!"