>>717804I guess it depends. Which of the two heads controls the dick, which one of them feels the dick?
With which arm do they jerk it and who conrols this arm?
If say the right head controls the right arm but the left head is the only one to feel the dick then the right one would basically jerk off the left one, making it both gay and incest. There are many other scenarios as well. If, for example, we take the butt into the equation it gets even more complex or if they watch porn or only one head is watching porn or if one head is asleep atm etc. etc.
Too many questions and variables to answer that question.