Bill Maher joined Stephen Colbert on "The Late Show" on Monday night, when things got a little weird, as the conversation between the two left-leaning comedians turned competitive.

According to Uproxx, with contributing content from The Huffington Post, the interview became tense after Colbert asked Maher about using certain curse words on his show.

Maher smiled and said, "Yes, but we do it better."

Colbert then asked him about invitations to dinner parties.

"Bill, they say at a dinner party you should never talk about sex, politics or religion. Have you ever been invited to a dinner party in your life?" Colbert asked.

Of course, this was followed by some laughter from the audience. Maher is a well-known atheist, and he is frequently an outspoken critic of conservative policies, shamelessly bashing the Republican Party for their seemingly uneducated comments and actions.

"I probably wouldn't get invited to your dinner party because we're very opposite," Maher responded, citing that Colbert is married and religious.

That is where things got a little awkward. Colbert admitted he was married and that he did "give religion a shot." But when he comically urged Maher to return to his faith, the "Real Time" host responded in his usual way, as in his monologues on HBO without FCC censorship.

"I do admit there are things in the universe I don't understand, but my response to that is not to make up silly stories," Maher responded.

The conversation segued over to politics, as the heat seemed to rise and the comedians seemed to be on par with each other about Ben Carson's Republican bid. But when the conversation turned to Trump and the length of American election cycles, the two went in surprising directions.

"I hate to tell you, Bill, but the latest Ipsos Reuters poll has him at 42 percent among likely Republican voters, baby doll," Colbert said.

Maher quickly followed with, "Maybe, but we got another year to go, sweetheart."

Watch two clips of the interview below. The second video features the awkward exchange between Maher and Colbert.