Every genre has a porn genre, like every Ying has a porn Yang. Probably zombie porn is the biggest challenge ever: can a Zombie be sexy? We found an interesting article here.
"When an audience is anticipating watching a zombie movie, usually they can count on the walking dead vigorously craving brains and human flesh. However, some audiences now expect the living dead to be hungry for pussy and cock, as part of the newly established zombie porn genre...."

picture by Christopher Brian