Quote from Ted in Moving Day
Marshall: Ted! Lily: What are you doing here? Ted: Robin and I aren't gonna move in together after all. Lily: What happened? [flashback:] Robin: I thought we decided we were ready? Ted: I know. How did we come to that again? Robin: I don't remember. We were fighting? It's all so blurry. Ted: Yeah. Robin: The "let's move in together" sex was pretty amazing. Ted: I know. I did that thing with no hands I normally need both to do.