This has been around for ages, but it is usually a well kept secret. It could be that the fairly recent advances in communications such as the internet has brought it to the front and more and more people are finding out they are not alone and are getting more comfortable letting it show. As to why? Well can you explain why one would like dramas over comedies? Or prefer pizza over a steak? It is something we all have that is unique. We all have free will and therefore we have preferences. My only answer as to whY, is Why not?