My hands have a lot of perspiration (not enough to drop, but enough to become wet). I want to play guitar, but a friend of mine told me that I can't, since my hands are wet. I don't know is it true of not, as I have no idea about playing guitar (or any string-based instrument) yet. He says that my hands would slip on strings especially when playing high tempo pieces like Austrias or Alhambra.

Is he right? Does becoming a gGuitarist depend on dry hands?