VigFX Male Enhancement So it’s hardly a surprise that anything affecting a man’s ability to perform sexually, for better or worse, can have a huge psychological impact on him. And that’s what makes it such a problem that this, of all things, is one of the many natural functions that declines with age. We’re not just talking about the elderly here, either. Most guys in their 20s already can’t perform quite the way they did as teenagers, and it’s only downhill from there. Age brings a gradual but inexorable reduction in testosterone, and with less and less of that all-important male hormone, sex just isn’t what it used to be. Men know the score.