Outside of weird sex acts, I think movies that feature somebody with an erection shown on-screen might be one of the rarer sights in-cinema (I know full on nude man erections are considered NC-17 worthy, but you also don’t see a lot of clothed erections either) I’ve seen plenty of movies with shown or implied oral sex on a woman (which also IIRC is very taboo in movies) but I can’t really think of a movie that showed somebody with a tent in their pants either in a comedic or sexual way. And nothing where somebody implies something he sees gives him an erection, you have to see the actual physical reaction of it. So no guy saying “This gives me a special feeling in my loins!” but you don’t actually see the special feeling bubbling up.
Correct me if I’m wrong but it was one of those shower thoughts I had recently, that I could think of pretty much every other sex related thing in a major film but not an erection.
Anchorman featured a scene where Will Ferrell’s character (Ron Burgundy) had an erection. It was for comedic effect. The movie came out in 2004 I think.
In the Man Who Wasn’t There Billy Bob Thornton pulled out a pleat of his stiff pants to imply an erection in a scene where he is listening to a teen-age Scarlett Johansson play piano. This wasn’t in the script, but was an ad-lib by Thornton.
As far as graphic male erections in “mainstream” media, the last I recall was in the cable series American Gods.
Once I started a thread with a similar question, but focusing on taking a dump on film, and the rarity of it, compared to real life. After a running start, the thread was closed for being a “parody thread”. Hope this one has a longer life.
At least one, but I think several, films of the American Pie franchise show clothed erections, even as scene setups.
Little Britain USA famously showed not only a head-on shot of a (clothed) erection, but followed through with a visible ejaculation that left absolutely nothing to the imagination. The series was broadcast over the air on public television in Europe, though in the more prudish USA it was shown only on HBO.
I recall a scene in a movie called Angels and Insects, where a character is caught in flagrante delicto, jumps up from the bed and runs across the room - with a very visible erection thwobbling about. It was a “that actor appears to be very in-character” moment.
There was an episode of the Drew Carey Show where he had a similar pants problem. I can’t find a link but I remember one specific shot with the pants bulge in the foreground and Diedrich Bader in the background with a somewhat horrified look on his face.