Specifically boy/girl porn with a bisexual focus in mind like what you see on corbinfisher's co-ed section with men from the gay side of the industry who swing or can swing both ways(I'm guessing they're a lot of them). To me the great lack in porn is the inability to have good looking boys and girls with the same degree of sexual flexibility to the same sex side do each other. Obviously this would be done differently from conventional straight porn boy/girl where the full body and perennial shots of the male are neglected. I think if kink pursued this they would definitely get some viewers. Bisexual eye types(who make up a fair bit of its membership) as well as neglected female gazing hetero females. I think that you have enough men in the gay porn industry who get tested nowadays due to the trans crossover element of porn where this can happen. There would most likely be more condom use(like what you see with girl/tgirl scenes though not all the time) which isn't great obviously, however, there mere existence, even with condoms, of this type of porn is better then nothing.