I'd pay if there was a more discrete way of doing it. Overall, you should pay for the things you want. Or they will go away (well probably not porn). But like local businesses and such.
Yeah, but it still shows on the bill. My wife wouldn't like the idea of "paying" for porn. Free is fine though. She is also a bit paranoid, so having my own card would make her uncomfortable.
Just throw it to paypal. But better yet, I'm not trying to teach you to be deceptive. If your wife isn't against free porn you should tell her what the implication of free porn means.