I just want to have argonians like this. Now it is not the argonian, but I wonder if they could look like that.
I dont think that is true Argonians can change their gender by injesting hist sap but it is not mentioned that they did so because the hist demanded it.As far as I know, the "amount" of hist sap ingested / consumed does not decides about the look. It only reinforces connection with the hist. And since hist is a sentient, intelligent species it is more the will of the hist how to form / shape argonians. So I would assume, that different hists have different needs, personalties and different approach.