We found the final scene where Max sacrificed himself for his family quite emotional


My guess is a bit of both, I think that the code would be the same but would affect each synth slightly differently, and then their experiences would further shape them. For example Niska is more guarded and violent because of the abuse from her father and in the brothel, Mia is the most nurturing because she spent years taking care of Leo, Max seems the most naive and trusting which is probably because he was the youngest and always had the others looking out for him.”
I don't know about the programmed to know about adult things. I suppose if they are created with a large store of knowledge it must be in there (even if only in a nature documentary kind of way). I think what Elster did was pretty creepy regardless, Niska clearly did not want to be sleeping with him; the fact that she kept it from the others strongly suggests that she felt it was wrong and/or was ashamed about it.