For those of you reading this and burdened with very uncomfortable and embarrassing memories, you may well still be able to get the result you want even from women who think anyone who likes 'that' is some sort of perverted criminal.
In my bachelor days I always tried to encourage a subconscious link between tickling and orgasm by gently flicking my girlfriends with my fingertips in various places while they were climaxing. Done subtly enough it didn't break the mood, and in subsequent frolics could be increased slowly in intensity until giggles or even laughter would occur at those moments.
With quite a few partners, over time this ripened to arousal when tickling was employed as foreplay. Sometimes they'd orgasm even when non-sexual areas of their bodies were tickled. KT's one of that happily con/per/verted breed.
Calculated and Pavlovian? Yes. But a certain degree of calculation's needed for any sexual encounter, even if you've been sleeping with one another for years. It may sound trite, but regard her as a violin and play her accordingly.
I am so glad someone posted a response like this. I have applied and enjoyed the same results. Once in fact with a lady who had previously instructed me to "Never try to tickle me. I hate it!"