Umm,
All great photos seem too good to be natural. That's what makes them great photos.
Take the above photo. This is a true 'when lightning strikes' photo. I saw this fight. THIS WAS NOT A POSE. This scene happened so quickly that you actually have to go into slow motion to see it. The photographer got lucky. This 'pose' lasted 1/10th of one second.
The Time's Square photo kiss is not really hard to believe as compared to this. Out of all the millions of people kissing in Time's square, its really not all that hard to get a good shot as compared to catching a once in a lifetime knockout punch/pose that lasts 1/10th of one second that can only be captured by one angle, one position, with a 1950s camera that does not have rapid reload/shooting capability.
The NY times kiss is like winning at bingo. Everyone eventually does it.
The Ali photo is like winning the lottery. Once in a Million lifetimes.
Mel...