Vice President Biden has been in elected office in Washington for four decades.

And he's still having more fun than just about anybody in the nation's capital.

Here's a mashup of Biden being Biden at Thursday's swearing-in ceremonies in the Senate (courtesy of the good folks at TPM).

The ceremonies ran for nearly an hour and a half, and Biden seemed to love every minute of it.

Slate's Dave Weigel recaps some of the best one-liners:

On Delaware's Tom Carper: "I don't know this next crowd!"

To the female offspring of Orrin Hatch: "You know what I tell my grand-kids? Take care of your grandfather. That's your most important job. No serious guys til you're 30."

To Claire McCaskill, on her daughters: "You gonna build a fence around the house? A lotta machine guns?"

To Joe Donnelly: "If I were a bettin' man, I woulda made a lot of money on this guy."

To Heidi Heitkamp, after being told that everyone needed to put his/her hands at his/her sides: "Spread your legs!"

To one of Tim Scott's very large brothers: "Call me if you need help on your pecs."

Our favorite part: The amount of time Biden spends talking with/to each lawmaker's mother.