A good stylist is hard to find. If I was your stylist, and you showed me a picture of your penis you'd be banned from my establishment. I would feel violated, whether I liked you or not. If I was remotely interested, you'd have just blown it. I suspect she isn't interested in you. Maybe it's because she'd rather have you as a client. Maybe it's because she isn't available (which doesn't necessarily mean she's in a relationship). Maybe she thinks you're cool, but just not her type. If she's been rebuffing you for a year, let it go! Find someone more responsive.
EDIT: I'm seriously trying to figure out how you get from THIS...
(you) Hey, you want to hang out sometime? Just to chill?
(her) No, sorry. I can't. Thanks. See you in two weeks for your next cut?
...to THIS...
(you) Here's picture mail of my genitals! Enjoy!
I don't understand what would make you want to do that.