Why exactly is telling someone that they look younger than their years considered a compliment? If it's better to look younger, then the implication is that it must be better to be younger. And with that premise I most vigorously disagree.
In interviews with several gay men over 60, a frequent comment was, "I feel invisible!" But are we truly invisible in the world at large or, specifically, the gay social circle of bars, clubs, and circuit parties?