Not Being Willing to Share, and Taking "No" for an Answer

Hi everybody!
I just joined this site yesterday, and already I've had at least two people (don't worry, I won't name you) who have asked me for photos. The thing is though, I just don't want to, especially with complete strangers. I believe in privacy, personal space, and not sharing every little dirty and dark secret of mine online for all the world to see.
Am I one of the very few people on this planet who have yet to take any "selfies", because I'm just not vain enough to do so? Are people like me a dying breed in this age of constant self-promotion, narcissism and being open to the world without any dignity, self-restraint or common sense?