Rule 34 explains

It is a novelity account from reddit about rule34 (if it exists, there is porn of it). Pretty interesting:

On the surface, Rule 34 seems like a hilarious idea; if it exists, there is porn of it. The humor lies in the shock and surreality of the moment for the average user stumbling upon the pornographic interpretation of an idea held dear.

And while I agree that it often times can be funny, the truth is that most of these are not being created as a joke. If Rule 34 really was just an anti-authoritarian 'rebel yell' of the internet, it would have passed into obscurity long ago. But we can see that it has been consistently happening since the dawn of the world wide web, and even longer before. Truth be told, the only difference between today and a few centuries ago is the means of distribution.

It's human nature to sexualize. For every conceivable person, concept, object or emotion there has been at least one person who got off thinking about it. There is no shame in that either; for we are merely prisms, refracting the energies of biology and evolutionary drive into a rainbow spectrum of sexuality. Yet despite the rich diversity of what is capable, we may sometimes feel forced to see the world, and even ourselves, through the colored lenses of a chosen few. This is no way to live your life. You will not feel whole without being at peace with your sexual identity, and you will not be able to love your fellow peoples as deeply without being able to truly see them.

Yes, that above is a picture of Donnie Darko kissing Frank the Rabbit, and it exists because someone out there truly enjoys the sentiment of the idea. Someone out there was moved by the characters, and so took it upon themselves to create from nothing, a way to express their desires and ultimately themselves. It is this form of expression that will ultimately reach across the spans of the internet to touch the soul of someone, somewhere who needs it the most. They may be an avid masturbator, comfortable and experienced with their wants and their body, or they may be in the midst of a sexual awakening, alone and terrified of the implications of their desires. Either way, this art form will for one brief moment allow them a shared connection and reminder that they are not alone.

tl;dr You wonder what the people that draw these are like, and I tell you they are no different from anyone else.