No matter how much pagans like to have sex, I would like to think that even they would think that extortion is wrong. It can happen to them too.
When morality and the underlying assumptions about behavior collapse, then the unthinkable becomes thinkable.
So even sexual extortion becomes something that people might not see anything wrong with. If they have no morals or values to start with, if they think any type of sex is okay, with any number and any gender of partner, then they might think sexual extortion is just a game.
Not saying I agre with that reasoning, but people without ethics values and morals think very differently than most of us do.