Couldn't you just mute the porn and put on some music if you're that worried about pissing off your S.O.? Seems like an unnecessarily big effort to put into watching porn in secret.
Your significant other says "what you doing on the internet?" you say "Watching Porn" massive argument ensues. You say "watching music videos" and the world is a happy place. Apart from that, it's a porn niche. What's the point of licking feet or liking big ladies. Each to their own. BTW nice name mate.