With a traditional video game, I can sometimes put up with bad graphics (purposely or otherwise) if the gameplay is really fun or the story engaging.
It's harder with porn games as the visuals help a lot with why you're likely playing the game in the first place, as wank material. I've tried to get into a few text-based games or games with limited/bad art that people swear by, but If I'm not playing the game for the porn, I would rather just be using that time to play a legit video game, of which I have many in my backlog.