Hi Carmelita !
Thanks for adding that !!
You know , it's actually quite curious you mention his smile and i'll tell you a short story.
When i started studying all this , a few months into my studies, i came across on internet one of OP's pictures and he was smiling the way you described it.
That made me go ( typically when you go through that phase , you look at faces to find something , even if it's not really there) "whoaaaa look at this guy's smile, it's contempt , it's contempt !!!.
Well , i was so convinced of what i had seen .
I then went further into my studies and learnt much more (which is the most difficult part, learning to see what's NOT there) . Let's say so much more that it made me revisit most things i had already labelled as certain.
I then came across a picture of OP (which i have recently seen again) when he's probably 2yrs old , sitting on somebody's lap , laughing the EXACT same way. (if you're looking at him, left corner of his mouth up, only left eye involved and semi-closed as in a genuine smile and same un-involvement on right side of the face).
I linked my studies with that kid's picture and i can almost definitely call that a physical trait , for i don't think that a 2yrs old kid , can understand/feel/process contempt.
Also , he always smiles like that, it's not occasionally.
However , there's still something that completely has me thinking (which is where i am with my studies atm , although big parts are very difficult for me as i have no neurological background).
There's way too much un-involvement on the right side of his face , which doesn't mean that it's not a genuine feeling , quite the contrary .
But potentially , it can mean one devastating thing: only one side of his brain is able to generate/process/push that emotion.
And if OP is right handed (i believe that he is) it would potentially lead down one path:Memory lane , the part of his brain used more memory "storage".
In short , his smile is true (in general) but there's only one side of his face that can generate/manage that emotion.....It's as if there's nothing in his true subconscious memory that can handle such a joyous and positive emotion: happiness
Take any pic of him with Reeva when he faces forward and cover the left side of his face , you'll see what i mean.....It's like another person.