Let me take a step back and get all meta on this thread. Reading through this last page quickly reminds of that Simpsons episode where Lisa gets gum stuck in her hair, and random characters show up out of nowhere offering increasingly ridiculous-sounding home remedies for removing gum from hair. What enjoyable drug or combo has not been mentioned?
The conclusions I draw from this thread:
* The adult entertainment industry is a conversation topic that attracts a lot of know-it-alls.
* As the Using Drugs At Work thread goes to show, people go to work high on anything and everything. Porn is no different.
* Frequent drug users who aren't stupid and want to keep their jobs do their best to keep it hidden at work. Porn is no different.
* Because most people who work while high keep this to themselves, it's hard to have any meaningful discussion about a drug being popular or common.
Finally, as in any job, there are probably a large number of people, perhaps a majority, who require no drugs whatsoever to do the job to everyone's satisfaction. Due to the nature of the job and the way it caters to men's basest fantasies, it probably arouses a lot of jealousy to think that there are guys who can pop an enormous, unfailingly hard woody on command in front of a camera and a crowd of clothed people, have sex for 2-3 hours, and then shoot like a geyser, with no chemical enhancement whatsoever. But this world is full of people who can do some pretty amazing things naturally, that most of us would require extensive training or enhancement to be able to achieve, if we could ever do it at all.