As Barack Obama and Joe Biden wrap up their first joint campaign tour since formally accepting the Democratic nomination, Biden is developing one of his roles as running mate - that of self-deprecating Obama admirer who humanizes the campaign. Amid somber talk about Hurricane Gustav, the economy and health care, Biden brought a little levity at his own expense at a town hall meeting in Toledo, Ohio. When a woman in the audience yelled out that she thought Biden was gorgeous, he asked her to repeat what she'd said, and told campaign staffers to make sure his wife Jill heard about it. "I haven't heard that that in a long, long, long time," he joked. Sharing the stage with Obama, who is 47, Biden, 65, added, that "hanging around with this lean young looking guy is making me feel pretty old, you know what I mean?" Later, recalling how he'd campaigned against Obama last year and early this year in the primaries before dropping his bid, Biden interrupted himself and said, "I don't know why the heck I didn't drop out earlier."