Caption & Click

Do we caption an image first, or do we click the shutter first?
When we are framing a shot, are we thinking of the message behind the frame or we just capture a moment and later think of a message to associate to it?
Somehow it is a bit unnatural to me that we go photo hunting and then associate some tags to the photos to give them meaning, or make them more memorable. I guess we fake it, and apparently everyone is faking it. We go by the rules, whoever makes a better fake, gets more "like"s and "comment"s. To me, it is like make up, we all know it is a fake but still we put it on; meanwhile, whoever makes a better job in concealing it and making it look more natural gets more attention.
Most of what we do, story telling or blogging, or posting in social network, all is fake, isn't it? All is made to get attention and attraction. And why am so bothered about it? After all even natural selection favors deceitful behavior. (See Selfish Gene)