Joe Biden Has Fun on the Campaign Trail -- PICTURES

It almost sounds like the set-up for a joke: "The vice president walks into a diner where's this group of bikers ..." But it's not. While campaigning at Cruisers Diner in Seaman, Ohio, Vice President Joe Biden chatted with the patrons — including a trio of motorcycle riders, at least one of whom seems to be amused — on Sunday, Sept. 9, 2012. (AP Photo/Carolyn Kaster)

Pictures of Vice President Joe Biden's cozy-looking chat with a female biker at Cruisers Diner in Seaman, Ohio, on Sept. 9 went viral. But no, she wasn't sitting on his lap. There's a chair there — honest. (AP Photo/Carolyn Kaster, File)

Joe Biden arrives at a campaign stop at the Bridge View Center in Ottumwa, Iowa on Sept. 18, 2012. (AP Photo/Charlie Neibergall)

Vice President Joe Biden adds bare-knuckled emphasis to a point during his speech in Ottumwa, Iowa. (AP Photo/Charlie Neibergall)

Shaking hands and kissing babies may be a campaign-trail cliche, but Joe Biden was taking the job seriously on Sept. 13, 2012, at the Zorn Arena on the University of Wisconsin (Eau Claire) campus. (AP Photo/Stacy Bengs)

Forget the babies — in this Sept. 8, 2012 photo, Vice President Joe Biden kisses a female supporter at a campaign event in Zanesville, Ohio. (AP Photo/Carolyn Kaster, File)

He might draw the kissing line at humans, but Joe Biden still offers an affectionately warm hello to Karma, a supporter's golden retriever puppy, in Chilicothe, Ohio, on Sept. 8, 2012. (AP Photo/Carolyn Kaster)

Campaigning has its perks. Joe Biden stops for a soft-serve ice cream cone at a Dairy Queen with former Ohio Gov. Ted Strickland while on the stump in Nelsonville, Ohio, on Sept. 8, 2012. (AP Photo/Carolyn Kaster)

Maybe it was because of the summer heat, but Vice President Joe Biden was a bit more unbuttoned than usual as he spoke at Spiller Elementary School in Wytheville, Va., on Aug. 14, 2012. (AP Photo /Don Petersen)

Joe Biden donned protective goggles for his tour at the Edison Welding Institute before speaking to the Plumbers & Pipefitters Local Union 189 on July 19, 2012, in Columbus, Ohio. (AP Photo/Jay LaPrete)

Vice President Joe Biden and granddaughter Naomi Biden joined President Obama to catch a pre-Olympics exhibition basketball game between Brazil and Team USA in Washington on July 16, 2012. (AP Photo/Pablo Martinez Monsivais)

Joe Biden watches as a new graduate celebrates during the commencement ceremony for Cypress Bay High School on June 4, 2012 in Miami. (AP Photo/Wilfredo Lee)

Hmmm ... the photographic evidence would seem to suggest that the vice president likes to hit the Dairy Queen when he's in Ohio -- which, let's face it, is pretty often these days. Here, Joe Biden hands out ice cream cones after stopping at a DQ in Steubenville, Ohio, on May 16, 2012. (AP Photo/Tony Dejak)

Celebrating National Parks Week, (seated front, from left) Vice President Joe Biden accompanied by Sen. Bill Nelson, D-Fla., and Rep. Alcee Hastings, D-Fla., on an airboat tour of Florida's Everglades National Park, on April 23, 2012. (AP Photo/Alan Diaz)