When Abe returned home from work, his wife Ruth said, “So how was your day?”

He replied, “I met an artist and I've never met someone so talented. He said he painted a picture of a cobweb on his wall and it looked so real, the maid tried for over an hour to get it off.

Ruth said, “I don't believe him.”

“Why not?” said Abe, “some artists are very good indeed.”

“Maybe,” said Ruth, “But maids aren't.”