The original Police Academy has a scene where Mahoney hires a prostitute and sneaks her under a podium, where she performs what one might call "surprise fellatio" on Captain Lassard while he gives a speech. Afterwards, Mahoney pops out from under the podium and waves to Lassard, suggesting that he was the one who performed the fellatio. Edgy and hilarious in 1984, but I think most modern audiences would recognize it as sexual assault followed up with a homophobic response. (Although I will say Lassard's response was almost progressive by 80s standards.)

Hamburger: The Motion Picture has a similar oral sex related sexual assault gag as well, where a guy goes down on a girl from under the table. The scene also takes place in a Chinese restaurant with, you know, one of those menus with the racist jokes. (The movie itself is still pretty funny, though.)

In terms of rape in movies, though, there's one in particular in Saturday Night Fever, of all things. For the most part, it's a classic movie, but there's a scene where the protagonist's friends all gang rape one of their other friends for reasons that are not really clear, and afterwards John Travolta's character tells her she deserved it, and yeah, just an awful scene that, I don't know, maybe it made sense in 1977 but it aged poorly very fast. Saturday Night Fever is very culturally relevant, it's the movie that made disco a mainstream phenomenon in the US, but that one scene is fucked up.