Frog tied bondage treatment

When we watch porn we imagine the porn actress as our lover or atleast as our friend with benefits for the time being. How can anybody think of treating his girlfriend like this? And please dint give shit like - everybody has kinks, it was consensual and bla bla. We all know how easy it is to sway our lovers. If you have to restrain her and think that she will go away from your kinks, you never deserved her.