Well, thanks for the advice, I'll try and forget it and leave it to them.
I do see why people watch and look up porn, and if it's something a married couple are open about then sure, why not? But if one or the other is not okay about it, it shouldn't be done if it's going to be taken the wrong way AND in the worst way possible, mum will then see it as either he doesn't love her anymore or just plain pissed he's fantasising about other women.
Today I finally gave in to mums constant pestering of me to download the original Duke Nukem for Dad, saw the download history and noticed a suspicious file, so I looked up browser history and saw a site saying "YOU HAVE A VIRUS!", it was obviously the install file to a malicious fake firewall(though I can't see any evidence it had been installed). Turns out he's discovered internet porn and has been doing so for the past year. I assumed my parents had been happily married for the past 25 years, I had to lie to mum because if she found out...all hell would break loose, this is the kind of thing that could potentially destroy their marriage if taken to a large enough scale as other problems will be brought to the surface.
I feel sick...
Is looking at porn absolutely the sign of an unhappy marriage?
Somebody besides Sam answer!
I certainly understand not telling your mom about the porn though. I mean, come on.
Though I come from a Christian family(that explains a lot), both parents had a strong anti-porn stance, though the shock to my mother would be great enough to start other things too, and then EVERYTHING they can find that's going wrong with their marriage will just be blown out of proportion. I now see Dad as a hypocrite, and I KNOW he knows he shouldn't be looking anything up that would go against his vows of honesty etc. Keeping from someone is just as bad as lying. Also if I told mum, Dad CAN get illogical, then become abusive and blind with rage, and this sort of thing could land me a trip to the hospital if he discovers I found him out.
I can only really talk to my brother about it as another family member, though I'm certain none of us would know what to do.
My opinion would be that you do nothing, it's an issue strictly between your parents. They're both adults, they're in a relationship, the intimate details of which are their own affair. It's certainly understandable that you feel weird about it, but watching porn and masturbating in and of itself isn't sick or perverse and frankly is pretty natural. Your parents have been together (I assume) for a long time and your dad might just need some external stimulus. I'm not trying to gross you out or anything, but he's a guy and he has needs. There just doesn't seem to be much, if any, benefit to you bringing it up with anyone else. If you DO decide to bring it up with him, you might want to tell your dad "to be more careful with what you're downloading" or something. This might be a discrete and less embarrassing way of explaining to him that you found it and it might make him rethink his habits. That's what makes sense to me though, you certainly understand your family dynamic better than anyone else here.
But now, this should help ease the unsettling feeling I had: