For self-reflective sophisticated communicators, which most humans are, sex of this sort becomes reductive and objectified. Your focus on her external appearance is realised by her, via your gaze upon her, where you, your body, your mind and your objectification of her all become essential elements of the very common sex game being played out privately in your safe bedroom. Not even hard enough to leave any marks. In real life, it was just awkward for me. You name it, I love it. After you tie one wrist, lick your way over to the other to keep her excited while you finish the setup.
It has been theorised that rape is an evolved reproductive strategy in male primates, including humans 5.
Women tied up for sex
Antisociality and Reproductive Strategies, Sex Roles. Order by newest oldest recommendations. It would be so bland otherwise. You say that outside of the bedroom your girlfriend is "anything but submissive". It has been suggested that sperm retention takes place via the biological function of the female orgasm aiding that particular male's chances of fertilising the ovum 4.