Wow, I just sat here and read through this entire discussion. Interesting.
I tend toward the consensus that one shouldn't rely on labels to define themselves sexually and just do what feels good to you (all the "beyond the pale" stuff - which is to me, children and animals - notwithstanding). Besides, I tend to believe that all of us have at least a little kink in us...even if it only gets indulged in fantasy. Even fundamentalist Christians, I'll wager. I think I've already established that I am pretty steadfastly anti-label, lol.
As for talking about sex on tfp, I think I've done my share. I talk about my current relationship and things that we do, but I don't think I'd be comfortable relaying a blow by blow re-enactment of our time together. Other than that though, I'm completely comfortable talking about things I like and things I've done...or, have been done to me.
Although it wouldn't be in my nature to start threads simply to talk about my own sex life.
and just as an aside...
abaya, you can purchase nipple clamps that are adjustable and allow you to ease into it. S'nice.