The trick is making sure that something one person finds pleasurable but the other doesn't isn't so distasteful that the second person can't enjoy the first person's pleasure.
Yes, maddie, I'd agree...that would be my difference between pushing a soft limit vs trying to get at hard limits.

lol, and the 'first person's pleasure' seems to be a major turn on for me...I even get off on the distasteful stuff then.

.....mmmhh.....sensory deprivation....been dreaming about that ever since reading about some of Timothy Leary's experiments in the sixties....*sighs*