Well, yeah you are probably right about older porn stars because it's true that most porn stars don't stay in the business very long. Even the most successful ones. Being in the biz for more than 5 years is a long time for a porn star normally. Most will have moved on by then using the money they've made to go back to school or go to venture into a new field of work that's more conventional or perhaps their real dream. So I'd imagine the actresses that are still in the biz after an extend period of time might be more drained and be less passionate about the job.
After all, the majority of porn actresses enter the biz in their youthful years (aka during their sexual prime). So age plays a large factor in terms of sexual activity and interest in sex in general. You'd have to be one of the few veterans like Nina Hartley, an 80's porn star with a very high sex drive who's a big advocate of sexual growth/enlightenment, sexual openness, and sexual education in order to stay in the business such a long time and still be passionate.
Hell, in 10 years I have a feeling that if I'm still doing plain old software engineering and not more research-oriented or at least more interesting bleeding-edge work, I'm going to have this awful drained look about me too. There's nothing like going to a job you don't enjoy as much anymore every single day for years.
I have no problem or guilt about enjoying porn. I do have a moral conflict if it's illegal pornographic content and would feel guilty from watching it if I later found out a participating party was forced to partake or unknowingly partook in it without their complete consent. Other than that, the only emotion I feel comes from embarrassment when someone finds my porn stash or other personal items. It's more just me thinking, "Shit, now they're going to think I'm a weirdo". Or like I mentioned before, the guilt of being caught by my catholic mother. Although, I no longer have to fear being caught by my mother or having a family member catch me, now that I don't live under their roof and am not financially dependent on them. In most cases, my embarrassment or guilt comes from the fact that I've made another person feel embarrassed or uncomfortable by my actions and personal choice, lol.
I have no beef with those who don't enjoy porn or feel guilty by watching it. I don't care if you have religious beliefs that frown upon it, as long as you don't try to preach to me or condemn me for not sharing the same views on the subject. You see, despite being fiscally conservative, I'm not a social conservative. I'm a proponent for legalization of marijuana, prostitution, gay marriage, etc. Despite having never smoked a joint, never utilized the services of a prostitute, and being straight, I believe that what you do behind closed doors and the proclivities you enjoy are your own personal business, your own personal choice of lifestyle. Others should be less quick to judge you as long as you aren't hurting someone else directly (and to an extent, indirectly- i.e. second hand smoke) by doing so.
However, I will concede that there have been times where I have questioned whether my enjoyment of porn will have given me bad habits that I'll have to break later down the road. Kind of like the ones VB6 and Cuphead's CleanSlateBot gave me when I first started bot development and programming. At this point it's merely speculation as to the possibility that porn might have given me an unrealistic view of sex and intimacy in real serious relationships. Since I will admit that porn cannot relay the emotional gratification shared between two individuals who engage intimate acts and have a healthy, loving emotional relationship outside the bedroom. But I don't think I'd feel guilt, shame, or embarrassment if it turns out that this realization is true. Mainly because I'm a big proponent of personal responsibility. In fact, I can sometimes be unintentionally harsh on others who are in situations of their own doing (I'm working on getting better at being more empathetic), and even more harsh on myself if the cause of my problems are because of my own failures. So in the event I have been given some bad habits that will need breaking, I think I'll just feel like I'm an complete idiot for continuing to dig a deeper hole I'll eventually have to get myself out of, and deserve what I get.
Wow, this turned out to be helluva long... my bad.