We learn this from Dana Milbank today:

On Saturday, the Boston Globe caught Obama red-handed after the new Democratic front-runner stole words from Edwards. Obama announced that “we shouldn’t just be respecting wealth in this country — we should be respecting work,” suspiciously similar to Edwards’s line in 2004: “we’re going to reward work, not just wealth.” Obama also joked about commercials about sexual-performance drugs that “have all these people running around in the fields” — not unlike Edwards’s 2004 joke about the same drugs: “Take it, and the next day you and your spouse will be skipping through the fields.”

Sounds like Obama ads soon will need more than just the “I approved this message” line.  They might require warnings that “Voting for Barack Obama with a nitrate medicine can cause a serious decrease in blood pressure, leading to fainting, stroke, or heart attack. If you vote for Obama during sexual activity, if you become dizzy or nauseated, or have pain, numbness, or tingling in your chest, arms, neck, or jaw, stop and call a campaign manager right away.  Do not vote for Obama more than once a day. Allow 24 hours to pass between votes. Contact your precinct chairman or seek emergency attention from Ron Paul if your next Obama speech is painful or lasts longer than four hours.”