Adam: The scene is about the fact that these two people, while they have a very strong animalistic connection, they're ultimately only going to hurt each other. It's about the tragedy of realizing the relationship is too intense to survive.
Jessa: Adam, that's us. We're the intense ones. All you and Hannah ever did was sit around, watching those shows about when fat people do up their houses or whatever, or you ate Frito-Lays in bed. And then you met me, remember? And then you met me, and then we had a real connection, you had real feeling. And that's what this movie's about!