I'll copy something I wrote a few years ago to someone that had 5 month old cockerels. You may find something useful in it. And you are right, not all roosters and not all hens follow the idealized behavior. Some roosters don't dance. Some hen don't immediately squat but may run away. The...
What are your goals with having boys? Why do you want any? The only reason you need a boy is if you want fertile eggs. Anything else is personal preference. Nothing wrong with personal preferences, I have a few of those myself. But those are wants, not needs.
Once you determine what your...