@mingnoosh, after a great deal of experience with fluffy cat tails, may I offer a bit of advice? Remember that cats apparently have no idea where their tails are, until they get stepped on or pulled or something else happens to them. I have seen a cat with a fluffy tail walk past a lit candle and set her tail on fire, all without realizing it! Fortunately, I was able to get to her and put the fire out before it reached skin, but I've been very careful with candles since. I light them only in rooms that the cat has been locked away from. And my Jasmine regularly knocks things off of the side table next to my seat, not deliberately, but with her tail.
It appears to me that a cat's tail is not under her conscious control. Watch a cat grooming her own tail some time. She has to hold it down like a mother grooming her kittens, because it's continually twitching and trying to move away. Quite entertaining, actually.
Oh, I don't know about that Margret
. I'm sure my cat knows exactly where her tail is and how much force to slap me in the face with it... repeatedly. lol