oh god, this does bring to mind my random character thought of a few months ago, what would it be like to be half vulcan half betazoid? Able to feel emotions but not experience them, if that makes sense. Meh
As I understand it, Vulcans start out able to feel/experience emotions, and learn to supress and control them. There is a 'ritual' of sorts that completely cuts them off from emotions, however, that many undertake (It's part of some philosophical path?).