Honestly, I don't know if everyone can. I personally think so--the act of learning something like tarot or palm reading opens up the natural perceptive abilities of a person, if that doesn't sound too new-agey, but I've never tried to figure out if this is true. I just picked up a book on it because I'd always thought it was neat. I was expecting it just to be a cool parlor trick, reading a couple of lines for friends and having a laugh about it. Imagine my surprise when it turned into this strangely perceptive thing. The other weird thing is that it's exhausting--two readings in an hour and I get silly, tired, have a hard time focusing and can't do any more until I've had a rest and some carbohydrates. This isn't usually a problem, except that one accurate reading usually means that everyone in the room wants their turn too, and you don't want to turn them down because they're so excited over it.