Was that Charles Melton's real penis in May December? You'll just have to continue reading to find out. Is May December based on the true story of Mary Kay Letourneau? That, it is. Julianne Moore portrays a woman inspired by Letourneau - a teacher who famously fell in love with her very underage student, was imprisoned for having sex with him, had two of his babies, and married him. In May December, an actress named Elizabeth, played by Natalie Portman, interviews Gracie (Moore) for an acting role in which she plays a woman inspired by her. It's very meta. Through their girl talk we learn about Elizabeth's explicit romance with the underage Joe Yoo (Riverdale star Charles Melton). May December is obviously a movie that isn't afraid to go there, and we get more than we bargained for with Charles Melton's awesome sex scene. He shows his ass while having sex on the floor in the missionary position with Natalie Portman. When he pulls out, we can see his rock hard, and very well endowed, penis. However, Charles Melton penis this is not. Our nudity experts deduced that a prosthetic was used for this nude scene in May December. Letourneau-she-betta-don't!