Why should we never ask balloons for advice？

谜语题目：Why should we never ask balloons for advice？（为什么我们绝不向汽球征求意见？）
 
 
谜语解析：They are full of hot air.因为它们里面全是热空气。hot air热空气；吹牛，胡说
 
 
谜语答案：They are full of hot air.因为它们里面全是热空气。

上一篇：Why do people go to bed？
下一篇：Why is a coward like a leaky faucet？