英语短笑话:父亲在哪儿？

Where is the father?

　 Two brothers were looking at some beautiful paintings.

　 "Look," said the elder brother. "How nice these paintings are!"
　 "Yes," said the younger, "but in all these paintings there is only the mother and the children. Where is the father?"

　 The elder brother thought for a moment and then explained, "Obviously he was painting the pictures."