Well said. I think women who say it's demeaning to those women like you who pose or are in porn videos are projecting the feeling of being demeaned themselves, since they feel like they are being subjected to comparison as a body and not a person to the people like you. I've struggled myself to come to terms with this.
What I think people need to realize is we all have fantasies of things we wouldn't actually do, and it is human nature to seek sexual variety, even if who you are with is what you consider the best of the best. This is especially true for males, and it has nothing to do with whether or not they are in a good relationship or find their significant other attractive (although if they don't or are otherwise unfulfilled, this is probably going to increase their porn watching, but that's probably a given, and it is totally based on the individual).
Good for you for being comfortable with yourself. I think a lot of women envy that and are resentful of it.
Plus, if you do tend to have an ostentatious/exhibitionist streak, it's probably healthier for you to have an outlet like this where you actually have compensation than to have a less ideal outlet.