My B's tail uncurls when he is completely passed-out…that's when I know I can mess with him and he won't wake up...hahaha
It is interesting that some do and some don't. The one thing I'm finding out about B's, they're very different in so many different ways!
Two have no kinks in the tail at all and can make their tail completely limp. Two have a little kink at the very end…....it's always there, but the tail can relax.
Two have kinks so tight, you couldn't straighten it......and those two just hate for you to even touch their tail.