Well, depends on what you feel about teenagers but a common thought is **transition** from childhood to adulthood, or, maybe awkwardness.
About the bedroom, I was thinking more of your deeper self, not necessarily your sexual self. It makes sense to me that the bedroom may represent our deeper aspects. I think of it this way: intimacy with ourself. What's the 'bed' usually for? Intimacy with our partners. BUt our dreams are typically about ourselves so it may translate as intimacy with ourselves.
It could be more sexual related to yourself but I just wanted to clarify my thoughts.