I offer sounding in my sessions. I am and have been a Professional Dominatrix for over 13 years. I actually took a class when I first started out from a Seasoned Professional Dominatrix, at Domcon, a BDSM convention, twice a year, Los Angeles in the Spring and New Orleans, in the Fall. Actually, she watched each of us use a sound on her male sub, to make sure we were using the sounds correctly.