These are great replies. Somewhat as I expected.

I didn't throw the slave aspect of BDSM into the original question because I thought it may have influenced the direction the answers would go. If the stories I read about the slaves are even close to reality there may never be any vanilla sex in those relationships. That is why I originally didn't bring them into the equation. I did hint at it when I said "the intensity of those activities" but didn't directly mention slaves. Actually I never before believed there were such a thing as slaves until I read about them advertising for that position in the "Personals." BUT again, I'm probably totally wrong, they may also enjoy vanilla sex.