In gay sex, it is often the act of anal sex which kind of hard to pull off in real life and would take a lot of stamina and lubrication. Especially for gay porn, gay people do not really like porn that make things look super romanticized or overdone, gays know for themselves how gay sex is done and want to relate to it as much as possible. There is also some sense of these porn stars appearing to be more tangible than your usual popular porn actors. So anything amateur or fairly shot, something like homemade or filmed at one's own home, it feels more familiar and less fake and thus feels more realistic and achievable to happen in real life. There is something super sexy and hot about amateur stuff, the feeling that it is not filmed professionally and that the angles are not shot in a way to make it seem like everything is faked and nothing is real and authentic.
