I absolutely hate smiling for photos. It feels fake. I don't really like having my picture taken, to be completely honest, even though I'm not bad looking.
I really hope this study is as meaningless as I suspect it to be.
I feel the same way you do about photos, but I fear that the study isn't quite as meaningless as you suspect. It's seems quite plausible that unwillingness to conform to social norms by faking a smile correlates to (lack of) success in marriage.
I really hope this study is as meaningless as I suspect it to be.