The core of this is that this is a bigoted, puritanical, sexually repressed culture in denial and self loathing. Our beliefs create our reality - e.g. there are men who believe that the path to happiness and love is to get a great job that pays big money. This lets them buy the things to get the best wife possible and they believe that in return she will give love to him. In doing so they approach her like a prostitute, and they will get treated like the pimps they are. They are in a state of psychotic delusion and will be treated like the whores they are.
Sex is a bargaining chip to be withheld or given as a control mechanism.
For sex and sexuality is indeed the core of the above issues. If it is dysfunctional, so will be our relationships, use and abuse of power, how we see and treat ourselves and others. Our very nature goes under cover and we live a lie with ourselves, live as pretend people fitting into some nice formula. Cool if you have size 9 feet but crippling if not. I'd rather be a deviate than a mindless, bland clone of others.