I've practiced symbol magick and sex magick extensively, yes. But in relation to BDSM? Not so much I'm afraid. Usually a partner and I will paint symbols for the Goddess and God or the elements onto our bodies and then raise power by making love to invoke those associated powers.

We've also used associated animal totems painted on our bodies to invoke what we'd like to achieve... a butterfly for the power of transformation, or a hawk for the power to be observant and clear sighted, for strength and courage.

Its an excellent question, thankyou D