One of the things I really love about my Dad is that he is always willing to be my model without question.
If, for example, I should say, "Hey Dad. Let me put these Confederate Flag flip-flops on your belly for a photo. Just be the backdrop, okay?", his response would undoubtedly be, "Okey-doke!"
And really, what's better than that? Answer: Nothing.
I should point out that I am not in charge of his facial expressions. He gets total artistic freedom with that.