When I was younger, many of my romantic escapades were just a means of simply avoiding being by myself. I was afraid of feeling lonely, afraid I wouldn't know what to say to myself. ↗
The love scenes that worked, regardless of the director, were the ones where the actors weren't fearful. When somebody was fearful, you could see it right away. It takes you out of the story, and that's to be avoided at all costs. ↗