WWW- Borat Sagdiyev is not a real person, no matter how many media outlets treat him like one. It thus stands to reason that his over-endowed son, who’s the subject of a major sight gag in the new Borat movie, is also not real. So who was that fellow whose impressive khrum inspired such an enthusiastic thumbs-up from his on-screen father?

His name is Adrian Cortez, but he’s better known by his nom de porn, Stonie. According to his manager, David Forest, Cortez is a 25-year-old gay porn star who has appeared in around 65 films.

Borat’s producers first contacted Forest in June 2005, he tells Radar. “They wanted to find someone who would look 13 or 14 but was actually of legal age and would do frontal nudity,” he recalls. Cortez immediately sprang to mind, he says, because “he’s a small-framed boy but has a large organ.” How large? “About eight inches, and thick.” As for his nickname, Forest says, “I guess it’s because he was a stoner. I don’t know.”

The shoot took one day, and Cortez told Forest that Sacha Baron Cohen, the comedian who plays Borat, “was a lot of fun. Sacha is a crack-up.” Forest won’t say how much the job paid, exactly. “Let’s put it this way: He earned far more for this photo session than he would’ve if it had been for an adult company. We got paid a good sum of money.”

Neither Cortez nor Forest was invited to the Borat premiere, but it’s been good for the actor’s career in other ways, says Forest: “What’s funny is he’s always been famous for his ass, because he has this amazingly hot ass, and yet in this movie he’s becoming famous for his dick.” Oh, the irony.