LOL I was thinking about the couch the other day
... maybe Amy has been spraying it with pheromones or something?
I like that Amy's apt has become a very usual set on the show. And despite Sheldon being so attached to his apartment and his spot and everything, he sure spends a lot of time at Amy's apt., and that shows he feels confortable enough around Amy and by extension, her home. If you think about it, most of their meaningful moments happenned on that couch, and I hope many more come too.
Also, I really dig that her apt number is 314 (I see what you did there writers
)