Iphone Self Portraits

I'm taking Cheryl Johnson's iphoneography class, and it's really got me using my iphone camera a lot more.  The first assignment was to take a self-portrait,which I think is perfect for an iphone camera class because I think the iphone has led to a HUGE INCREASE in the number of self-portraits that people take (even if most people aren't consciously thinking about the millions of photos they take of themselves and post to facebook as "self-portraits"). I submitted the self-portrait above for the assignment. It's me, in my office at work.  Being able to "reverse the lens" and see yourself while taking the picture really helps. I've also gotten better at having a more natural expression in self-portraits.  I also took these two self portraits on the same day (one in the car, one on the walk into work):

Sometimes I like to take more abstract self-portraits, like this one:

It's me, looking into my iphone, about to examine the photos on my "camera roll."  Yes, I have to look over my glasses to see things which are that small!  And, yes, I did just recently get my roots done. Ha!
Finally, I offer a totally silly self-portrait:

Because iphone cameras just seem to make people want to pull faces. Why is that, I wonder?