the ability to fully enjoy a romance and relationship with NPC is what makes RPG amazing it give us meaning and feeling to are characters and when something happen it makes us feel situation and either is sadness or enjoyment.
Ok.... What does it have to do with anything? Do you need someone record for you a soft porn video for you to start caring about them?
Edit. Also the title "sensual gameplay". Cutscenes aren't gameplay and the sex scenes (are the more? I avoided romances after min) are as sensual as rubbing two action figures against each other.