Like Facetious said, it's one of those things that everyone related with but they don't want to get involved with. Kind of how numerous people say they want to help drug addicts or really sick people, but they would never in hell be the ones who push the wheelchair or help the smelly druggie on the subway to the hospital.
I can honestly say that I wouldn't want my parents, children or girlfriend to be in porn. Looking at something from distance and being directly related to it are two completely different things to most people, including myself.
But nah, I'm not really embarassed about general porn things and I don't think the people I talk to are either. I remember in high school even the girls would join when we talked about porn stuff, and it was mostly good laughing. Might be different in different places though. Americans seems to be a bit uncomfortable around sexual matters than europeans in general, but that's just my perception