Gender in Horror Film

The one thing I see in a lot of horror films is that the main target of a monster is the female, to either kill or to procreate with. My knowledge of horror films is very limited and so I don't know of any films where the target of the monster is the male. The male is usually killed or murdered in these films because he gets in the way of the monster and its target. Now Carol Clover sees a connection between the slasher film and pornography and explains that both movies have a rating system. She says that for a horror film to be "good" it shows the audience something that makes them fearful of the situation. It makes a person feel like if they were put in this situation they would likely die. As for a porno film, it's rated on how erect it would make the viewer. Is the reason for why a woman is the target of a monster connected to how the director would want this movie to be accepted? Does seeing a woman in distress make the movie seem like it would be sexier than a man? Does the thought of a man being able to personally save a woman from disaster make the movie more enjoyable? I feel that is the reasoning behind it or at least a big part of the reason why.