Whenever characters in comedic movies or TV shows end up looking at porn they always do that “head-tilt” trope, which suggests whatever they’re seeing (and the audience isn’t) is so twisted they’re having a hard time telling up from down.
The new poster for Joseph Gordon-Levitt’s Don Jon very subtly tricks the viewer into doing the same, at least if you want to get a good look at the seductive looks Julianne Moore and Scarlett Johansson are giving off.
Coincidence? Probably. But it’s also appropriate given this film’s twisted take on love and sex.