Monsters’ Cooper Koch didn’t use prosthetics in the shower scene

Cooper Koch is proud of his manhood.

The 28-year-old actor appeared on “Watch What Happens Live with Andy Cohen” on Monday and cleared things up about his role as Erik Menendez on the Netflix smash hit “Monsters.”

Andy Cohen was counting down Hollywood’s “five most iconic frontal moments” when Koch announced, “Just to say mine wasn’t a prosthetic.”

“Well, that would be my next question!” Cohen, 56, told Koch, who smiled into the camera as he confessed.

“Congratulations to you Cooper,” added the “Real Housewives” producer.

“Thank you,” Koch replied.

Cohen then told the openly gay actor he was “very blessed,” to which Koch replied, “Well done.”

Koch had to bare all for a scene in “Monsters,” which follows the story of Erik and Lyle Menendez, who murdered their abusive parents in 1989 and were sentenced to life in prison in 1996.

During episode 3, Erik de Koch takes a naked shower in prison and turns to another inmate to show him, and the camera, his penis.

In an interview with The Wrap last month, Koch revealed how much he prepared to play Erik on the show.

“I turned my trailer into Erik’s room, so I had clothes everywhere, and I had pictures of him on the wall, pictures of me, too,” Koch said. “I watched videos of myself when I was very young and saw how my parents treated me, which gave me a level of appreciation for my family and my parents.”

“I listened to (Erik) and watched him religiously,” he added. “And I had my music, I had all kinds of magazines, all kinds of different things to help me really feel like him and be him.”

The success of “Monsters” (which also stars Nicholas Alexander Chavez as Lyle) has led to the possibility that the Menendez brothers may finally be released from prison.

Los Angeles County District Attorney George Gascon announced earlier this month that new evidence of sexual abuse against the brothers is being reviewed. A court hearing has been set for late November, which could result in the brothers being tried again or even out of jail.

Erik, now 53, and Lyle, now 56, argued at their trial that they were sexually abused by their parents, Jose and Kitty Menendez, and killed in self-defense, but the jury still found them guilty .

“I believe both of them,” Koch said in a recent interview with Vanity Fair. “I think everything they said on the stand is true.”

Koch previously revealed that he spoke with Erik over the phone the night before the “Monsters” premiere. She later went to visit Erik in prison alongside Kim Kardashian.

“I had a really good conversation with him and told him that I believe him and that I did everything I could as an actor to stand up for him and portray him as authentically as possible, and that I think the show does very good job representing him,” Koch told Variety last month.

Koch also said they discussed Erik’s criticism of the show during his and Kardashian’s prison visit.

“Monsters: The Lyle and Erik Menendez Story” is streaming on Netflix.