I've never been able to open up !

There has only been perhaps 2 maybe 3 at most that can see through the painted on smile but even with them I just couldn't, can't open up fully. Apparently even as a very young child I was the same, my mother told me that I had a rag doll that was eventually named ' Agro Doll ' as even before I could speak I used to punch, kick and jump up and down on it until I was exhausted