Not all people who watch massive amount of pornography become transgenders. There are also a lot of people in frustrated countries like Iraq, Syria, Egypt, India, Pakistan and Bangladesh who haven't had sex in their lives so they watch a lot of porn. This doesn't mean that they are going to be transgenders. If you google which country watches more porn, I am sure Pakistan will come on top. I don't know why but people must be really frustrated there.
In countries such as Pakistan and Afghanistan, almost the entire male population is bisexual. In fact, the older men are said to prefer younger boys above women and girls. There is even a saying in that part of the world, which goes like this: "women are for child-bearing, boys are for fun". And this is quite accepted by the society, as boys without a beard are considered to be female.