What+happened+in+ch+3-4+statements

Correct me if I'm wrong:

1. In the Brave New World, children are taught to experiment sexually at an early age.

2. Lenina Crowne and her friend Fanny are worried that Fanny needs to get laid... so she doesn't get attached to her man

3. The epilisons are a upper caste in the Brave New World.

4. The world we know today is despised by the world controllers in the BNW.

5. There was a war that caused the change in the world formation, and it occurred in 632 AD.