The aggressive James Deen you see in porn is just an act ... according to his friends, but he believes that on camera image is what led to him being accused of rape.
Deen -- one of the most famous male porn stars -- has been accused of sexual assault by at least two porn stars. One of them is his ex-girlfriend, Stoya, who says it happened off camera.
Our sources say Deen finds the on set allegation very odd ... since no one, among the numerous cast and crew members, reported him for any violent behavior -- plus, people on porn sets know more about limits than the average person.
We're told Deen feels his accusers are confusing his sexually aggressive characters in porn ... with the real him, who is not at all violent.
The accusers have not gone to police yet. Deen has denied all the allegations, saying ... "I want to assure my friends, fans and colleagues that these allegations are both false and defamatory."