What you are trying to accomplish is to scratch someone's imagination and tease them to get interested. Simply by saying: come join the fun or been having fun for a while will do the trick.
What a selfie cannot do is keep someone intrigued for a long time. And the most important thing when it comes to Snap Fuck flirting is remembering this concept: listen to understand, not to respond.
Selfie will get you in, masterfully done flirting will keep you there.
This is an amazing experience that is quite unique and cannot actually be found anywhere else.
That would work so much better than posting your "natural pose" selfie as you would leave room for imagination to kick in.
And if some of those selfies ever get captured by this way or another, it won't expose you to an unwanting privacy violation.
Anyone can find a picture of a hot or a beautiful face, but the art of flirting is not so easy to master.