JC, just to be clear... for you, watching a porno of your folks would be no different than seeing another couple with similar age and builds?
Oh course I don't want to look at them doing it or hear them do it (I don't really want to watch anyone do it, it just seems invasive), but if I did see anything I would just leave. Like I said, I heard my sister and bro in law going at it through the wall one time. It didn't really gross me out, I just went to a non-adjacent room out of respect. I'm talking more about people acting like its this major thing that will scar you for life.
Its just the human body. I've long forgotten the tone and pitch of sex sounds through walls and the smell of a brother in law who refused to use a fan when in the bathroom (which I criticized, not because poop is evil, but because its impolite to leave something stinky lingering when you have opportunity to disperse the smell).