This idea that if someone has never engaged in a certain activity, they can't comment on the legitimacy or worthiness of that activity is nonsense. Even if someone has never actually had sex, they can still comment on it. I've never had sex with a 300lb black woman, but I can quite positively say that I would never want to. I've never killed someone innocent in cold blood, but I can comment on the rationality and ethics of doing such a thing. I've never used crack cocaine, and even if I "Don't know what I'm missing", I really think I'm just fine not knowing what I'm missing in concern to that.