I know this isnt teen porn related but it's really funny ,talking about plot in the early 90's someone gave me a bunch of porn movies and there was one about a Mexican wrestler (a gay movie by the way) i cant remember why but he had to reach the top floor in a tower to reach THE FINAL BOSS, like a videogame, in each floor there was an enemy who would "fight" with him and teach him a " skill" (you know what i mean ,all kind of sex positions and that kind of stuff ,anal, fellatio, etc).
The funniest thing was in THE FINAL BATTLE, haha he was giving a hard fight when suddenly he start feeling bad ... OMG, he was weak on the floor and then he says "YOUR COCK...YOUR COCK...WAS... POISONED" hahahahha
Oh man that was the funniest thing i saw,THAT was a plot , Im not into gay porn but seriously man. XD