I don't think its all the same as identifying one's self as gay or straight.

There is a big difference between thinking one knows what one's path is, and walking upon the path without any reservation.

And yes, in the way in which I was taught, as previously mentioned, no one is capable of actually being a slave from day one in that manner, though in todays PC world many do indeed make such a claim.

One can think they are, one can hope they are, but one won't know for sure until one has not only put one's self out there for real at the full mercy of another (which can only really be done face to face) and "actually" done it, and not only kept doing it for some time, but also been "tempered" by the challenges such a journey brings and finally leaving all doubt about who and what one really is within one's self behind.