I've never really seen the appeal in watching somebody do something they so obviously don't enjoy.
Now, there are some "straight" guys who do gay porn who, whatever their emotional orientation, clearly have accepted that they can enjoy sex with a man. Whatever they may define themselves as, they obviously enjoy the physical activity. People like Kurt Wild, for example. Those I'm perfectly happy to watch.
But if they really are obviously only doing it for the paycheque and hating it the whole time, then no. No no no.