Justin Theroux's jogging scenes in his HBO fantasy drama series "The Leftovers" have instantly become famous among women due to his clearly visible "flopping schlong," and during his guest appearance in "Conan" Wednesday, Sept. 3, he finally addressed his now-trademark bulge.

Talk show host Conan O'Brien revealed that a lot of his female staff forced him to ask the 43-year-old actor about his "manhood" when the actor stopped by his chat show this week.

 "Okay, this is embarrassing, but I don't know how else to ask you about this," O'Brien said, according to Us Weekly. "Lot of fans of your show 'The Leftovers,' I really love the show, many women today on my staff came up to me and they were saying, 'You have to ask Justin.'"

"There's a scene where you're jogging and they say that your package is quite apparent when you're jogging in these sweatpants. All the women here are like, 'Ask him about it, ask him about it,' I was like, 'How can I address that?'" an uncomfortable Conan asked, according to Entertainmentwise.

Then O'Brien's sidekick Andy Richter screamed out: "You must address the flopping schlong!"

As Theroux covered his face with his hands and laughed, O'Brien asked, "Was there enhancement going on there? Did you put a clock down there?"

Jennifer Aniston's husband paused for a while to contemplate how he would answer the question in a "classy" manner. He then said, "The true story is, is that I didn't know that was a thing. There's two jogging scenes in the show. There's one in the pilot episode and then there's one we did much later. Oh god I can't believe, I don't even want to tell this story..."

But the hunk finally gave in, explaining what really happened after his famous first jogging scene. "When I went to get my wardrobe for the second jogging scene way later, there was my jogging pants and then there was two pairs of underwear in the dressing room," he said. "I was like, 'Oh, I can clearly choose between two pairs,' and they were like, 'No, they want you to wear them both.'"

When the "American Psycho" struggled to give further explanation, O'Brien quipped, "There's really not a question there, I'm just congratulating you."

Theroux's co-star Liv Tyler previously admitted that she was also distracted by the actor's sizeable manhood.

During an appearance on "Watch What Happens Live" last July, the 37-year-old actress revealed that she also took notice of Theroux's bulge, according to E! News.

"There was this scene where he was jogging. And there was quite a large bulge in his sweatpants, and it was all over. I get distracted when I watch the pilot, definitely," the actress said. "I'm like, 'Can't help but look there.' But I've never noticed the bulge other times."