Once in a while, people ask me why I don't take more pictures of people? Easy. Like many photographers, I am an introvert. My camera isn't just an artistic tool, it is also my protective shield. Asking a stranger if I can take their picture is really uncomfortable. My instinct is not to ask permission because they usually won't even notice. That always produces the best image.
But when they do, they often look at me like I stole their soles. Ever since 9/11, and especially since social media, people have become increasingly paranoid about hearing that clicking sound. As if I were working for the CIA and building a dossier against them. Of course, based on their reaction, maybe I should be??
As you would imagine, when I do ask, frequently the answer is no. And the ones who do say yes can't help but pose or smile and act anything but natural. Picture ruined.
However, if you ask a proud parent (because not asking would be creepy) if you can photograph their special snowflake, the answer is almost always yes.