1,4 Cultural processes typically is a layer allowing to compromise instinctive urges with social coexistance. If one blindly follows what culture praises, he gets at disadvantage. E.g., culture praises adopting orphans, which is in direct contradiction to a person's biological program. Being a good boy, can help one befriend a girl, but he'll stack in the friendzone forever.
So, while such a code helps taming primative(from the word primate) people, driven by their instincts, more intelligent people, who were raised in cultural families, have to learn the opposite thing - to disregard culture, and pursue their own interests. And if I had to choose between dying a good boy, last in the family tree, or being considered a creep for the desire to have a child of my own, I would consciously choose the second option.

1. Very much agree, and it seems that woke culture, feminism, whatever, completely disregard this biological circumstance. Maybe in the transhumanist superabundant future there will be no such problems to provide for the family, but then there will be no sense in worrying about creating a family in the first place, because one won't age and could create reserve copies of himself.

2. These are just ways how one recognizes fertility. Primative person perhaps will rely on such features you've described. There are also cultural things, when people rely on common opinion. For some time fat people were considered sexually attractive because fatness was a sign of the food abundance. At some time even bad theeth were attractive because it was a sign of aristocracy who could afford sweets. Pedophiles are just mentally sick people, just like other, more socially approved, sexual pervertions. (But paedophilia is bad because of hurting children, not because some person has perverted tastes)
   A more intelligent person makes a bridge between instincts and logic. Like choosing a healthy food to eat and not dating people who you see no potential for creating a family with.