Little Dick was interested in his father’s rapidly thinning hair. "Mummy,"he asked, "Why has Daddy such little hair?" 
"Because,” said his mother, "he thinks so much, dear." 
"Oh!"Said the boy, "and why have you such a lot, Mummy?"  
　　　　　　 　　 
无法解答 

小迪克对父亲头发日渐稀疏感到有趣.他问:"妈妈,爸爸的头发为什么这么稀少啊?" 
妈妈回答说:"因为他太动脑筋了,亲爱的." 
迪克接着问道:"噢!妈妈,那你为什么有这么多的头发呢?"