"""Women should never forget that it is common for powerful and seemingly self-assured males to have more than a bit of the Wizard of Oz in them. Pull the curtain aside, and you'll often discover they are not supermen after all. (Just ask their wives!)"" wrote Warren Buffett in a <a href='http://money.cnn.com/2013/05/02/leadership/warren-buffett-women.pr.fortune/index.html' target='_blank'>Fortune op-ed in May</a>."