Okay, so I finally thought I had found...

...something not covered by the internet:
"Lily Tomlin porn."

I was wrong. But I wasn't beat, not yet. Thinking a little, I Googled "Queen Mum porn." Surely that phrase was alien to the internet.

Wrong again.

So I took a final crack at it: "cleanroom porn." People couldn't be that weird, could they?

I know when I'm licked.