NEW YORK • He is not a comedian and going for a coffee run is out of the question, but United States President Barack Obama has nonetheless starred in an episode of Jerry Seinfeld's Comedians In Cars Getting Coffee.

In his latest pop cultural venture, Mr Obama did a special-guest spot for the comedian's popular Web series, which was posted on Wednesday.

Obama "has gotten off just enough funny lines to qualify for getting on this show", Seinfeld said as he drove a silver blue 1963 Corvette Stingray through the White House gates.

As the show's name suggests, Seinfeld usually takes fellow comedians for a drive in an exotic car to a diner or coffee shop, but a burly Secret Service agent blocked him and Mr Obama from leaving the White House grounds.

Instead, they drove in circles around the mansion, then Mr Obama showed off the interior of the presidential Cadillac, nicknamed "The Beast".

"I could call a nuclear submarine right here from this. It's a cool feature. Plus seat warmers," he quipped, before heading with Seinfeld to a White House staff restaurant for coffee.

Amid the small talk, viewers learnt that Obama blows off steam by cursing, that his underwear is all one brand and colour, that he shaves before he works out and that his guilty pleasure is nachos.

When asked how many world leaders are out of their minds, he answered: "A pretty sizeable per cent." He explained: "At a certain point, your feet hurt and you're having trouble peeing and you have absolute power."

Mr Obama, who is entering his final year in office, has appeared on several unusual shows, perhaps most notably on Between Two Ferns with Zach Galifianakis in 2014, when the comedian hilariously feigned total ignorance of the president and his policies.

Mr Obama joked that his motivation for appearing on Seinfeld's show is to encourage viewers to sign up for his healthcare programme.

AGENCE FRANCE-PRESSE, REUTERS