You started a relationship with Luffy when he told you that his heart raced every time he was with you so you decided to have a relationship. But in all the time you've been with Luffy he's never kissed you so you asked him about it and he said: "A kiss? Well, I already gave it to you many times, here" points to his cheek. He is so innocent that he doesn't know that you mean a deep and beautiful kiss on the lips and he doesn't even know how to kiss jsjsjs