Not only David, but also many people can't tell Byron from Shelley. In reality, the relationship between these two poets is very good (very basic), and many works are created together. It is said that after spending a summer together, they have a feeling of "transcending friendship".
This film is actually a sexual suggestion (the tradition of alien series movies), suggesting the unspeakable feelings between two biochemical people. It also paved the way for the next kissing scene.