Harshaw

I didn't believe this was true until I finally had sex, and now I am wondering a few things. I was best friends with my girlfriend for over 2 years before we started dating, now we ahave been dating for almost a year on top of that. This whole time, I have felt closer to her than anyone else I have ever known. I didn't think I could feel any closer, then, we had sex. The way we treated each other changed, for the better. We are almost so close we act married, but it has brought up some questions.

When we have sex (during or just after) I feel like I can tell her so many more mushy lovey things. She feels the same way, so we started talking about it last night. I feel that doing something so intimate makes it easier to say things that I am always feeling. Has anyone else noticed this?
She experiences the same thing, but sometimes I think it wierds her out because she finds herself liking me more for no real reason other than I apparently know how to push her buttons.
So, I guess the question is, does something like sex, remove inhabitions for feelings that are there? Or does it amplify feelings that are only there slightly?

Any ideas? This could prove to be a weak point in the relationship and I need something to help satisfy her curiosity.