Somebody once told me that the simplest answer to why is why not? Why not do this or why not try that? It boils down to the feeling that to everything we question there is always a counter-question which negates an authority of the original question. If somebody were to question your motives for doing something you can always negate it with why not? Sometimes, your juxtaposition might go against trends and what society calls correct behaviour. But, this itself gives rise to the question as to why we are accepting what we are being questioned. We can always justify it with a why not?
For those who haven’t guessed the relation of the caption to the image, look closely and you might see the reason and perhaps underlying symbolism.