I was going to try to explain why that is never the case, but instead I think I'll simply link to the greatest BE Addventure chapter ever,
Something for Everyone.
...Well, okay, I'll explain, too: options tend to be things like, "someone enters the room", or some other possible scenario that leaves what can possibly happen pretty wide-open. In our example here, it's very easy to make the ensuing chapter one in which the main character of the story is totally forgotten while their dad enters the room and has sex with a donkey that had conveniently not been mentioned until then.
In other words, people writing chapters to make the story go in the way they prefer it to go is why these places are full of gay donkey sex to begin with.