The only one I have is "Expensive Tastes" and they "ruin" the scene since it is implied Joey Silvera was being raped by a fag [who later turns out to be his girlfriend]. DEFINITE WOOD KILL! And, of course they follow the "Hayes code" and bad things happen to the bad people.

IF ITS SCRIPTED, I think if you can do it in a regular film, you can do it graphically in an adult film. So, if you wanted you could film a graphic "Scarlett rape" scene from "Gone with the Wind", etc. But, I think it has to have context - and most of the 70s/early 80s rape scenes have context.