Personally, I would much rather have a 'lee who enjoys it. I could get into B&D and D&S, but the S&M just isn't my thing. I don't find anything sexy about pain (well, I *might* enjoy getting a good spanking or something like that, but no serious pain). I don't want to experience it, and I don't want to inflict it. Just not my thing.
Maybe it's just because I have chronic pain myself (in the sternum) that often makes me feel sick and miserable and unable to bear it, but even when I read a tickling story and they talk about the 'agony' or 'anguish' or whatever of the victim, it turns me off. I don't want to hear descriptions of pain -- I want to hear descriptions of laughing. The laughter of a woman being tickled turns me on because laughter is positive, pleasant, sweet, innocent, not painful or uncomfortable or unbearable. In fact, it's not necessary, but my top favourite is stories where the 'lee actually likes and gets off on it by the end.
That being said, I think I see the 'torture' issue as separate from the 'pain or anguish' issue. I enjoy hearing begging, 'no, please, stop' or whatever, and I enjoy the idea of tickling as a 'punishment' -- like in 'you've been bad, I'm afraid you're going to have to pay the penalty' -- but only if it's not *serious* torture, it's just playful. I like the term 'tickle torture', but not in a literal sense -- it's more like a shorthand for 'tickling that's long, sustained, administered with a wicked grin, and at least pretend-nonconsensual, as opposed to momentary and warmly affectionate'. (Not that both kinds aren't good.)
So I say yes to 'torture', but only in a metaphorical sense. I don't enjoy the idea of truly inflicting anguish.