Hold my beer, I'm about to sound like a pretentious ponce with this.
Personally, I hold the designation of "porn" in high esteem. We're so oversaturated with it nowadays that it's commonplace, but there's a long and interesting history of filmmakers transgressing and pushing boundaries, going against societal convention, to create titillating images that people derided as porn. A movie like
In the Realm of the Senses was regarded as porn. It's gratuitous. It's inflammatory, disturbing, and provoking. It has value. Hell, even just two amateurs fucking on camera to make an easy buck, even if they're not intending to, runs contrary to the ways in which various institutions that be have tried to control human beings at large.
... and at the end of the day, my primary goal is to create something I find sexually stimulating.
So yeah, I kinda like the word porn.
Plus, having the "we're just a porn game" excuse is a pretty good tool when you want to conveniently deflect criticism.