Porky's is about a group of guys in the '50s who want to lose their virginities in a time in which guys not only admitted that they were virgins, but tried to fix that problem "together."
There's a place called Porky's, though, where a lot of the hot girls hang out and where a lot of the main characters are terrorized by the mean, fat, pig-looking owner named, you guessed it, Porky. As these guys awkwardly try and come up with plans to "get laid", you get a pretty heavy smattering of classic, unnecessary, gratuitous '80s skin in between seemingly interminable expository scenes. So, of course, you rewind the tape until your parents know exactly what you're doing. There's no reason someone should be rewinding and playing a tape that often and that quickly unless they're trying to solve the mystery of the Kennedy assassination.
The infamous Porky's shower scene features a bunch of guys finding a hole that leads to the girls' locker room, and kind of how you hope for every time there's a hole in a wall of any bathroom, there were actually attractive people on the other end.
Fun times ensue and a lot of teenagers and kids even younger than that in the '80s saw their first entire human body and/or group of women showering together. Many more would follow for all of us.
The notable part of this scene is that it was the first gratuitous scene most people had seen in a really popular comedy (which, as a film, dragged on for way too long wasn't even very funny). The whole thing was really just an excuse for showing naked girls and for a bunch of weird dads to take their sons to see a movie clearly intended for adults. This movie is at all memorable mostly because of that weirdly rapey scene and also because of another scene starring a young Kim Cattrall, who only gets hotter as she gets older.
This movie was largely an adult comedy masked in "fun," which was an awesome discovery for anyone who saw it and had the patience to deal with its pace. It's kind of like when you pour alcohol inside a juice box or a Vitamin water and bring it into your kids' plays or Disneyland.